Name: ___________________________
Date: ______________________
SPH3U – PRACTICE EXAM (McGraw Hill Physics)
Part A: Multiple Choice (K -
/25)
Choose the letter corresponding to the best possible answer.
1. The speed of a vehicle travelling at 90 km/h is equal to:
(a) 324 m/s (c) 129.6 m/s
(e) none of these
(b) 0.4 m/s (d) 25 m/s
2. Which of the following describes a vector quantity?
(a) An apple falls 6 m.
(b) A fish swims at 1 m/s.
(c) A student solves a puzzle in 10 min.
(d) A car drives 60 km north.
(e) An ant accelerates away at 0.001 m/s2
(f) the rock’s mass is 101 kg
(g) the book weighs 5 N
(h) the volume of this tank is 23 Lit.
(i) the distance of school and library is 1.5 km.
3. A woman walks 15 km[N], 4 km[W], 2 km[S] and 4 km[E]. The resultant
displacement is
(a) 17 km
(c) 25 km[N]
(e) 13 km[N]
(b) 17 km[N] (d) 8 km[N]
-The total distance is...
4. Which of the following objects most accurately demonstrates an object moving
with uniform velocity?
(a) a merry-go-round
(b) a runner racing from start to finish
(c) a tennis ball during a match
(d) a car traveling on the highway with cruise control on
(e) a sky diver falling
5. A car starts from rest and speeds up to 10.0 m/s in 4.0 s. What is the
acceleration of the car?
(a) 40 m/s2 (c) 2.5 m/s2
(e) none of these
(b) 25 m/s2 (d) 2.0 m/s2
6. Which force holds the protons together in the nucleus of an atom?
(a) electromagnetic
(c) weak nuclear
(e) all of the above
(b) gravitational
(d) strong nuclear
7. You have your seat belt on in the passenger seat of a car. The car suddenly
accelerates. Which statement best describes your motion?
(a) Your body will suddenly move forward with respect to the seat.
(b) Your head will suddenly move forward with respect to your body.
SPH3U – PRACTICE EXAM Jan. 2023
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Name: ___________________________
Date: ______________________
(c) Both your body and your head will move forward at the same rate.
(d) Your head and your body will suddenly move backwards with respect to the
seat.
(e) You feel very light headed.
8. If action and reaction forces are always equal and opposite then why do
objects move at all?
(a) one object has more mass than the other object
(b) the forces act on different objects
(c) the reaction forces take over since the action forces acted first
(d) the reaction force is slower to react because of inertia
(e) the action and reaction forces are not exactly equal
9. A cable on an elevator exerts a 6 kN upward force. The downward force of
gravity on the elevator is also 4 kN. The elevator could be
(a) moving upward with constant speed.
(b) moving downward with decreasing speed.
(c) moving upward with decreasing speed.
(d) moving downward with increasing speed.
(e) moving upward with increasing speed.
10. An airplane is moving at constant velocity in a straight level flight. What is the
net force acting on the plane?
(a) zero
(b) upward
(c) downward
(d) in the direction of motion
(e) opposite to the direction of motion
11. Work is not energy itself, but rather
(a) it is a form of kinetic energy.
(b) it is a form of gravitational potential energy.
(c) it is a force.
(d) it is a transfer of mechanical energy.
(e) it is a result of parallel forces.
12. Which of the following are equivalent to a joule (J)?
13. Work done is zero when
(a) an applied force does not result in any motion.
(b) uniform motion exists in the absence of a force.
(c) the applied force is perpendicular to the displacement.
(d) both (a) and (c).
(e) all of the above.
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Name: ___________________________
Date: ______________________
14. A weight lifter lowers a barbell at constant speed. Down is assigned as
positive. In doing so, the weight lifter
(a) does positive work on the barbell.
(b) allows gravity to do negative work on the barbell.
(c) does not do any work on the barbell.
(d) does negative work on the barbell.
(e) allows the kinetic energy of the barbell to increase.
15. Which type of energy is commonly a by-product of any kind of energy
transformation?
(a) sound
(d) nuclear
(b) thermal
(e) mechanical kinetic
(c) radiant
21. If a 6.0 Ω and a 24 Ω load are connected in series, then the current in the
6.0 Ω load is:
(a) four times the current in the 24 Ω load.
(b) the same as the current in the 24 Ω load.
(c) one quarter of the current in the 24 Ω load.
(d) one half of the current in the 24 Ω load.
22. Potential difference is a measure of:
(a) the energy available to a current.
(b) the energy lost when a current passes through a load.
(c) the energy per unit of time.
(d) the energy available to a unit of charge.
23. A copper ring lies in the plane of the page. A bar magnet is moving through the
ring into the page, with its N-pole pointing away from the viewer. As the magnet
moves through the ring, the current in the ring will be:
(a) clockwise.
(b) counter-clockwise.
(c) first clockwise, then counter-clockwise.
(d) first counter-clockwise, then clockwise.
24. For a transformer, the ratio of the primary voltage to the secondary voltage
(Vp/Vs) can be increased by:
(a) increasing the primary voltage.
(b) increasing the number of turns in the primary coil.
(c) decreasing the number of turns in the primary coil.
(d) decreasing the secondary voltage.
25. A conductor carries a current eastward through a magnetic field that points
directly upward. The direction of the magnetic force on the conductor is:
(a) west
(c) north
(b) east
(d) south
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Name: ___________________________
Part B: Short Response (I/C -
Date: ______________________
/6)
Diagrams and point form may be used when appropriate.
1. What could happen in each of the following situations?
(a) A vehicle tries to come to a stop at a traffic light on an icy street.
(b) A passenger in a car does not have their seat belt on when the driver must
make a quick stop.
(c) A student has placed their textbooks in the back window of a car. While
driving they have to make a sudden stop to avoid driving through a stop sign.
2. Compare and contrast between static and kinetic frictional forces? (This
means review the problem solving for both! As well.)
5. During an experiment with a bar magnet, the magnet falls on a concrete floor
several times. As the experiment progresses, it is observed that the strength of the
bar magnet is lower than it was at the start of the experiment. Using Domain theory,
explain the probable cause of this observation.
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Name: ___________________________
Part C: Application (K/I/C -
Date: ______________________
/36)
Provide full written solutions in the space provided below. Unless otherwise indicated, leave all answers
to 2 significant digits.
1. Use the position-time graphs below to answer the following questions:
Which graph best describes each situation:
(i) A car is stopped at a stoplight.
(ii) The light turns green, so the car gradually increases in speed.
(iii) A car is travelling on a highway at a constant speed.
(iv) A car slows down as they approach a school zone.
2. A sprinter is running the 100 m dash. For the first 1.75 s of the race she
accelerates from rest to a speed of 5.80 m/s. For the rest of the 100 m she
continues at a constant speed.
(a) What time did the sprinter achieve for the race?
(b) Draw a position–time and a velocity–time showing the motion of the sprinter.
3) A projectile is launched with an initial speed of 21.8 m/s at an angle of 35.0
above the horizontal from the top of a 25m high building. (This means review all
types of projectile motion)
g=9.80 m/s2)
a) Sketch a diagram of the path and show the initial velocity vector. [1 mark]
b) Determine the time of flight of the projectile. [2 marks]
c) Determine the maximum height of the projectile from the ground level. [2
marks]
d) Determine the horizontal displacement (range) of the projectile. [2 marks
e) Determine the final velocity when the projectile hits the ground (Impact velocity) [2
marks]
f) Determine the velocity of the projectile after 1.0 second of launch. (2 marks)
g) Velocity at the maximum height?
h) Velocity when horizontal distance is 2.0 m?
SPH3U – PRACTICE EXAM Jan. 2023
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Name: ___________________________
Date: ______________________
NO KINEMATICS!
4. A grocery cart has a mass of 32.0 kg. An applied force of 4.00 x 10 2 N [E] is
used to move the cart. The cart starts from rest and the force is applied for 5.0 s.
The coefficient of friction between the cart and the asphalt is 0.87.
a Draw and label a free body diagram of the system.
(c)
(b) Calculate the force of friction acting on the grocery cart. 272.832 ~270 N
(c) Calculate the acceleration of the grocery cart. 3.97 m/s2
(d) How far does the cart move in 5.0 s? (Suppose its speed is 19.9m/s at that time) 49.8m
(e ) The applied force is removed after 5.0 s from the start. For how long(time)
Distance)
23.2
m
will the cart move forward?
(f) How much work does the force of friction do in part (e )?
Review the graph of kinetic and static friction against time.
Review F-d graphs and the relation with work
Review
-How to read displacement AND distance from a displacement -time graph
- How to calculate velocity and acceleration from a d-t graph.
5. A 250 kg roller coaster cart loaded with people has an initial velocity of 3.0 m/s.
Find the velocity of the cart at A, B, and C.
5.An engine with 25 w power is moving an electric car with a constant speed of 2.0 m/s. What
force in average does it exert on the car? How much is the friction force?
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Name: ___________________________
Date: ______________________
6. A 15 V battery is connected to four resistors. Two resistors, 5.00 Ω and
7.50 Ω, are connected in parallel so that they are in series with resistors of
4.00 Ω and 5.00 Ω. Find the power used by each resistor, and the potential drop
across each resistor. What is the equivalent resistance of the circuit?
7. What is the cost of electricity if the above circuit runs for 120 days, 8 h/day?
Assume electricity costs 18c/kwh.
8) You are given with four resistors; 3 Ω, 30 Ω, 2 Ω and 5 Ω and a battery of 9v. A
current of 1.5 A has to pass through the 3 Ω resistor. How would you connect the
resistors? Use the following.
Review Magnetism; magnetic fields, lines, right hand rules , Lens’s Law,
Transformers, power loss, …
Indicate whether the sentence or statement is true or false.
The
1 slope of a position-time graph represents the velocity.
.
An2 object dropped from a window falls to the ground. The position-time graph representing the object's
.motion would be a straight line.
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Name: ___________________________
Date: ______________________
A 3car accelerates uniformly when the traffic light turns green. The velocity-time graph representing the
.car's motion would be a straight line.
The
4 slope of the tangent to a point on a curve that is part of a position-time graph represents the
.instantaneous velocity.
The
5 area under a position-time graph represents the displacement.
.
Consider
6
a trip from your home to your school and back home again. The magnitude of your
.displacement is equivalent to your distance travelled.
The
7 valve on the tire of a bicycle that is travelling due west at a constant speed is exhibiting "uniform
.motion."
The
8 reason your head feels like it jerks backward when pulling away from a stop sign is best explained
.by Newton's First Law.
The
9 force that propels you forward as you walk across the floor is the force that is exerted by the floor
.itself.
AP ONLY A 1child sits on a toboggan and slides down a hill with a particular acceleration. If another child joins
0the first one on the toboggan, they will slide down the hill with the same acceleration. (No friction)
.
If the
1 vector sum of all forces acting on an object is precisely zero, the object could still be moving.
1
.
If the
1 supporting cables of an elevator snapped and the elevator began falling, the passengers would
2become trapped against the ceiling of the elevator provided there is no air resistance or friction in the
.elevator shaft.
Two
1 people pushing an object across a frictionless surface will result in twice the acceleration than if
3only one person pushes. Assume the object slides in both cases and that both people push with the same
.force.
An1 elevator moves vertically upward with a constant speed. The vector sum of all the forces acting on
4the elevator is precisely zero.
.
If the
1 Moon was twice the distance from Earth as it is now, the gravitational force of attraction between
5the two bodies would be half as great.
.
For1 any pair of surfaces, the coefficient of static friction between the surfaces is less than the
6corresponding coefficient of sliding friction.
.
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Name: ___________________________
Date: ______________________
Work
1 is done when a net force is applied to an object over a certain distance.
7
In the same direction
.
Negative
1
work means the force applied is opposite to the direction of the displacement.
8
.
If a1 Mary Ann is holding a 100-kg barbell above her head for 5 s and Kavitha holds the same 100-kg
9barbell over her head for 10 s, then Kavitha has done twice the amount of work as Mary Ann.
.
A 2car with mass m moving with a speed of 4 has the same kinetic energy as a car of mass
016 m moving with a speed of 
.
Power
2 is the rate of doing work.
1
.
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
Which
4
of the following is a "scalar" quantity?
4a. distance
d. displacement
.b. velocity
e. none of the above
c. acceleration
The
4 term "uniform motion" means
5a. acceleration is constant
.b. speed is constant
c. velocity is constant
d. displacement is constant
e. velocity is zero
An4 80.4-km trip takes a time of 0.75 h to complete. The average speed, expressed in the correct
6manner, is
.a. 107.2 km/h
d. 1  102 km/h
b. 1.072  102 km/h
e. 1.1  102 km/h
c. 29.8 m/s
Study
4 the position-time graph pictured below and select the statement that is true.
7
.
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Name: ___________________________
a.
b.
c.
d.
e.
Date: ______________________
The object accelerates, stops, then accelerates in the opposite direction.
The object's speed is greatest during the first segment.
The object's acceleration is greatest during the last segment.
The object's average velocity is zero.
The object travels a greater distance in the first segment than in the last segment.
The
4 position-time graph that depicts a ball thrown vertically upward that returns to the same position is
8
.
a. A
b. B
c. C
d. D
e. E
Which
4
of the following velocity-time graphs represents the motion of a ball thrown vertically upward?
9
.
a. A
b. B
c. C
d. D
e. E
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PAGE 10/21
Name: ___________________________
Date: ______________________
A 5cyclist rides a bicycle 4.0 km west, then 3.0 km north. What is the cyclist's displacement?
0a. 7.0 km [37° N of W]
d. 5.0 km [37° W of N]
.b. 7.0 km [37° W of N]
e. 1.0 km [37° W of N]
c. 5.0 km [37° N of W]
. A car travelled 4 km at 120km/h [north] and then another 4 km at 60 km/h[north].
What is its average velocity?
a. 180 km/h [north]
b. 90 km/h [north]
c. 80 km/h [north]
d. 100 km/h [north]
A 5taxi cab drives 2.0 km [W], then 3.0 km [N], then 4.0 km [W], and finally 5.0 km [N]. The entire trip
1takes 0.30 h. What is the taxi's average velocity?
.a. 47 km/h [53° W of N]
d. 33 km/h [53° W of N]
b. 47 km/h [53° N of W]
e. 10 km/h [53° W of N]
c. 33 km/h [53° N of W]
Over
5 a period of 3.0 s a car's velocity changes from 18 m/s [W] to 12 m/s [W]. What is the value of the
2car's acceleration during this time? (Review acceleration in 2D as well)
.a. 2.0 m/s2 [E]
d. 10 m/s2 [E]
2
b. 10 m/s [W]
e. 2.0 m/s [E]
2
c. 2.0 m/s [W]
If an
5 object accelerates at 6.2 m/s2 [N], how long will it take to reach a velocity of 25 m/s [N] if starting
3from rest?
.a. 25 s
d. 0.25 s
b. 4.0 m/s
e. 4.0 s
c. 31 s
An5 object is thrown vertically upward at 25.0 m/s. If it experiences an acceleration due to gravity of 9.8
4m/s2 [down], what is the object's velocity 3.0 s later?
.a. 22 m/s [down]
d. 4 m/s [down]
b. 22 m/s [up]
e. zero (it has hit the ground)
c. 4 m/s [up]
A 5stone is thrown vertically downward with a speed of 10 m/s from a bridge. Accelerating under
5gravity (9.8 m/s2), the stone strikes the water 1.8 s later. From what height above the water was the
.stone thrown? (Assume 2 significant digits.)
a. 50 m
d. 15 m
b. 34 m
e. 3 m
c. 27 m
A 5curling stone is pushed along the ice surface during its delivery. Which of the following free-body
6diagrams best represents the curling stone?
.
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PAGE 11/21
Name: ___________________________
a. A
b. B
c. C
Date: ______________________
d. D
e. E
An5 elevator is suspended by a cable and moves upward. Which of the following free-body diagrams
7best represents the forces acting on the elevator?
.
a. A
b. B
c. C
d. D
e. E
Study
5 the free-body diagram below and determine what additional force(s) would be required for the
8object to achieve uniform motion.
.
For both diagrams first determine the
resultant force.
a. 1 N [W]
b. 1 N [E]
c. 2 N [N] and 1 N [W]
d. 2 N [S] and 1 N [E]
e. 2 N [S] and 1 N [W]
The
5 free-body diagram below represents a 2.00 x 103 kg elevator. What is the motion of the elevator if
9the tension in the cable is 1.96  104 N? Also, calculate the acceleration.
.
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PAGE 12/21
Name: ___________________________
a.
b.
c.
d.
e.
Date: ______________________
The elevator might be accelerating upward.
The elevator might be accelerating downward.
The elevator must be accelerating.
The elevator cannot be undergoing uniform motion.
The elevator must not be accelerating.
Which
6
of the following would Newton's first law alone NOT account for?
0a. A rocket accelerates upward from a launch pad and the engines' thrust overcomes
.
gravity.
b. A passenger leans forward in her seat when the car's brakes are applied.
c. Passengers on board an elevator undergoing uniform motion can't tell that the
elevator is really moving.
d. No matter how hard you push against it, the boulder would not move.
e. During launch, astronauts feel that they are being pushed back into their seats.
A 6heavy crate is pushed across a rough surface. The force that is ultimately responsible for the crate's
1motion is the
.a. applied force
d. net force
b. frictional force
e. normal force
c. gravitational force
A 6hockey puck of mass 150 g is sliding south along the ice and slows at a rate of 1.2 m/s2. What is the
2net force acting on the puck?
.a. 1.8  102 N [N]
d. 1.8  10-1 N [N]
b. 1.8  102 N [S]
e. 1.9  10-1 N [S]
c. 1.8  101 N [N]
Newton's
6
third law essentially states
3a. objects won't move unless pushed
.b. acceleration only occurs if there is net force
c. the acceleration of an object depends on its mass and the net force acting on it
d. objects which are moving tend to stay moving
e. forces always occur in pairs
Which
6
of the following observations would be adequately explained by Newton's third law?
4a. When turning a corner, a passenger in a car feels pushed against the door.
.b. One skater pushes against another and both move off in opposite directions.
c. The Earth is held in orbit around the Sun by a gravitational force of attraction.
d. The friction of a surface causes a sliding object to come to rest.
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Name: ___________________________
e.
Date: ______________________
A car's tires slip on an ice-covered surface.
A 6rocket accelerates upward and the thrust of the engines overcome the frictional forces and the gravity
5acting against the rocket. Which of Newton's laws of motion best explains this situation?
.a. Newton's first law
b. Newton's second law
c. Newton's third law
d. Newton's law of universal gravitation
e. All the laws combine to explain this situation.
The
6 gravitational field strength of Earth
6a. has a value of 9.8 N/kg [down] at all locations on its surface
.b. is greater at the equator than at the poles
c. is smallest at the peak of Mount Everest, the highest elevation
d. is largest at the deepest spot on the ocean floor
e. is largest at the poles
If you
6 weighed 112 N on the Moon where g = 1.6 N/kg, how much would you weigh on Earth?
7a. 1.1  102 N
d. 1.1  104 N
.b. 1.7  104 N
e. 6.9  103 N
c. 6.9  102 N
The
6 value of "g" at the surface of Mars is 3.7 N/kg. How much would a 60.0-kg person weigh at an
8altitude above the Martian surface equivalent to the planet's radius?
.a. 2.2  102 N
d. 56 N
2
b. 1.6  10 N
e. 28 N
c. 1.1  102 N
The
6 force of friction always acts in a direction exactly opposite to the
9a. applied force
d. normal force
.b. net force
e. motion
c. gravitational force
Study
7 the force system diagram pictured below and select the factor which would NOT influence the
0amount of kinetic friction.
.
a. object's mass, m
b. coefficient of kinetic friction, K
c. normal force, FN
d. applied force, FA
e. gravitational field strength, g
f. None of the above
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Name: ___________________________
Date: ______________________
A 7bungee jumper is about to jump from a bridge and he hopes the elastic tied to his legs will not break
1as he plummets downward. The type of energy at work when he is at the lowest point in his downward
.drop is
a. gravitational potential
d. elastic potential
b. kinetic
e. sound
c. thermal
A 7boy decides to ignite caps from a toy gun in the following manner: He uses a magnifying glass to
2focus the sun's rays on a cap. It ignites with a loud bang. Which of the following energy
.transformations best describes the situation?
a. sound → chemical → radiant
d. sound → radiant → chemical
b. radiant → chemical → sound
e. none of the above
c. chemical → radiant → sound
The
7 amount of work done to stop a bullet travelling through a tree trunk a distance of 50 cm with a
3force of 2.00  102 N is
.a. –4.00  102 J
d. –1.00  102 J
b. +4.00  102 J
e. +1.00  104 J
2
c. +1.00  10 J
In 7which case is positive work done?
4a. The work done by air resistance on a ball as the ball, which was initially at rest,
.
falls 3.0 m down towards Earth.
b. A eastward force is applied to an eastward moving soccer ball that is already
moving at a constant velocity to increase its speed in that direction.
c. Earth applies a force on the Moon as the Moon travels one completion rotation in
orbit around Earth.
d. A cart is moving at a constant velocity of 10 m/s [W] when a 0.5 N [downward]
force is applied.
e. The work done by Earth on an arrow as it is fired 200 m straight up into the air.
A 715-kg load of groceries is lifted up from the ground to the fifth floor of an apartment building. Each
5floor is 5.00 m high. The potential energy of the groceries with respect to the second floor is
.a. 3.68  103 J
d. 2.20  103 J
b. 2.94  103 J
e. 3.0  100 J
1
c. 7.5  10 J
A 7roller coaster has two vertical loops one after the other. The roller coaster has a speed of 7.00 m/s at
6the top of the first loop with a height of 22.2 m. It then proceeds around the second vertical loop with a
.height of 15.0 m. What is the speed of the roller coaster at the top of the second vertical loop?(assume
no friction)
- What would the speed be if 450 J of energy was lost between the two crests? (short answer)Suppose mass is 100 kg
a. 7.00 m/s
b. 13.8 m/s
c. 8.40 m/s
Answer:13.5m/s
d. 9.24 m/s
e. 11.2 m/s
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PAGE 15/21
Name: ___________________________
Date: ______________________
A 740.0-kg girl rides her 0.50-kg skateboard. She starts from rest and at a constant acceleration reaches
73.0 m/s in 10 s on a horizontal surface. How much power did she use?
.a. 6.1  101 W
d. 1.3  100 W
b. 1.2  103 W
e. 1.8  101 W
0
c. 6.1  10 W
The
7 amount of work an 118-W electric mower can do in 3.0 min is
8a. 3.5  102 J
d. 2.1  104 J
.b. 1.5  100 J
e. 3.9  101 J
c. 2.5  10–2 J
Matching
Study the velocity-time graph pictured below and match each segment of the graph with the description
of its motion at that time.
a. segment A
b. segment B
c. segment C
d. segment D
e. segment E
The
1 object is motionless during this segment.
5
4
.
The
1 object is moving with constant velocity during this segment.
5
5
.
The
1 object travels the greatest distance during this segment.
5
6
.
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PAGE 16/21
Name: ___________________________
Date: ______________________
The
1 object is experiencing non-uniform acceleration during this segment.
5
7
.
The
1 object is travelling north but accelerating south during this segment.
5
8
.The object has positive acceleration.
The object has negative acceleration.
Match each type of force with its description.
a. normal force
c. frictional force
b. gravitational force
d. net force
This
1 force is always perpendicular to the supporting surface.
5
9
.
This
1 force results from cohesive forces among particles in close proximity.
6
0
.
This
1 force is ultimately responsible for the object's acceleration.
6
1
.
This
1 force is exerted by all masses.
6
2
.This force never does work.
Match each of Newton's laws to the situation which they best describe.
a. Newton's first law
c. Newton's third law
b. Newton's second law
d. Law of universal gravitation
The
1 force that the Earth exerts on a group of astronauts gets progressively weaker as their rocket rises
6vertically upward.
3
.
At1all times the astronauts exert as much force on the Earth as the Earth exerts on them.
6
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Name: ___________________________
Date: ______________________
4
.
The
1 rocket accelerates upward and the engines' combined thrust overcomes gravity.
6
5
.
Astronauts
1
feel as though they're being pushed back into their seats during launch.
6
6
.
Problem
1) 1An impatient motorist considers speeding as he travels between two cities. If the trip normally takes
92.8 h at an average speed of 100.0 km/h, how much time will be saved if he exceeds the speed limit by
610.0 km/h?
.
2) 1A driver is travelling at 25 m/s when she spots a sign that reads "BRIDGE OUT AHEAD." It takes
9her 1.0 s to react and begin braking. The car slows down at a rate of 3.0 m/s2. Luckily, she stops 5.0 m
7short of the washed-out bridge.
(a) . a) How much time was required to stop the car once the brakes were applied?
(b) b) How far was the driver from the bridge when she first noticed the sign?
3) 1A box accidentally falls from the back of a truck and hits the ground with a speed of 15 m/s. It slides
9along the ground for a distance of 45 m before coming to rest. Determine
(a) 8 a) the length of time the box slides before stopping
(b) . b) the average acceleration of the box while it's sliding
(c) c) the time it takes to slide the last 10 m
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Name: ___________________________
4)
Date: ______________________
A girl wishes to swim across a river to a point directly
opposite as shown. She can swim at 2.0 m/s in still water
and the river is flowing at 1.0 m/s. At what angle θ with
respect to the line joining the starting and finishing points
should she swim? (This means review relative velocity)
2
0
1
.
4 -1) A person looking out the window of a stationary train notices that raindrops are falling
vertically down at a speed of 5.0 m/s relative to the ground. When the train moves at a
constant velocity, the raindrops make an angle of 25 when they
move past the window, as the drawing shows. How fast is the
train moving?
5) If 6.8 N of force is exerted horizontally on a 1.1-kg object and 2.4 N of friction is impeding its slide,
what is the object's acceleration? Draw a free-body diagram.
6) 2A force of 1.2 N is applied to an object of mass 1.5 kg. It accelerates at 0.50 m/s2. Determine the
0force of friction that is acting and the coefficient of kinetic friction involved.
2
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Name: ___________________________
Date: ______________________
.
2 person pushes a box of mass 4.5 kg across a rough surface (K = 0.18) for 2.0 m by a constant
7)A
0force of 10.0 N. If the object reaches a speed of 2.0 m/s by the end of the push,
3 a) what was its speed at the beginning of the push?
. b) What is the net work done on the box?
NO KINEMATICS!
c) How much work is done by the person?
AP
An2 object of mass 40.0 kg rests on the surface of a planet with a mass of 8.2  1022 kg and radius
only8) - 0
5
3.6 10 m.
(a) 4 Calculate the force of gravity acting on the object.
(b) . Determine the gravitational field strength "g" at the planet's surface.
(c) Calculate the force of gravity acting on the object if it is placed at a position 6.4  105 m above the
planet's surface.
9)
An2 air-hockey paddle hits a 48.0 g stationary puck with a force of 12.0 N. The puck travels 50 cm on
0the frictionless surface while the force is applied to the puck. Calculate the final speed of the mass at
5the end of the 50 cm. NO KINEMATICS
.
10)
A 2string hangs over a frictionless pulley as shown in the diagram below. A 1.0-kg mass hangs on one
0side of the pulley and a 2.5-kg mass hangs on the other side. Both masses are initially at rest.
6 a) Calculate the speed of each mass when the 2.5-kg mass has fallen 1.0 m from the rest position.
.
Let positive (+) represent upward.
b)
How much work is done by gravity on the system?
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Name: ___________________________
11)
Date: ______________________
An2 elevator motor provides 45.0 kW of power while lifting a 2000-kg elevator 35.0 m. If the elevator
0contains six passengers of the same mass and it takes 20.0 s to accomplish this task, determine the mass
7of each passenger. Determine the cost of electricity used for this lift if electricity costs $0.21/kwh.
.
12) -connected objects and internal forces
- Definitions of Velocity, acceleration, Newton, Joule, Voltage, Ampere, Watt, ...
- Electric Circuits, power, efficiency, cost of electricity
APs, inclined planes (including double incline) for forces and work unit + Springs and kinematics
Static problems for forces unit. This would be re-solve the test problems.
Note that magnetism is not reviewed since it was recent.
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