Phy.1.1.1 Analyze motion graphically and
numerically using vectors, graphs and calculations.
3. The graph represents the position of a cart as a
function of time.
1. Which pair of graphs represents the correct
relationship between displacement and the velocity of
a moving object?
What is the velocity at 6 seconds?
a. 0.33 m/s
c. 0.50 m/s
b. 0.43 m/s
d. 1.0 m/s
4. The graph represents the motion of a car moving
linearly.
When is the car moving backwards?
a. 0 s to 10 s
c. 40 s to 50 s
b. 20 s to 40 s
d. 50 s to 60 s
2. A person in a rowboat attempts to cross a river that
flows west with a strong current. The students starts on
the south bank of the river and is trying to reach the
north bank directly across. In what direction should the
student row the boat? Support your answer with an
explanation and reasoning for those choices you view
as incorrect.
5. The average speed of a cart during a 15-s interval is
3.0 m/s. What is the total distance traveled by the cart?
a. 0.20 m
b. 5.0 m
c. 18 m
d. 45 m
6. A car travels at 11 m/s east for 61 s, and then travels
at 25 m/s east for 31 s. What is the average velocity of
the car?
a. due north
b. due west
c. in a northwesterly direction
d. in a northeasterly direction
a. 8.5 m/s east
b. 16 m/s east
c. 18 m/s east
d. 36 m/s east
1
7. The velocity time graph represents the motion of a car
traveling over a time interval of 6 seconds.
Phy.1.1.2 Analyze motion in one dimension using
time, distance, displacement, velocity and
acceleration.
10. The graph represents the relationship between
velocity and time for an object.
Describe the car’s motion including acceleration,
velocity and displacement over the 6 second time
interval shown.
What is the acceleration of the object?
a. 15 m/sec/sec
c. 3 m/sec/sec
b. 5 m/sec/sec
d. 0 m/sec/sec
11. An athlete running 2.6 m/s increases his velocity to
3.7 m/s in 2.7 s. What is the acceleration of the
runner?
a. 0.41 m/s/s
8. A person throws a ball upward into the air. Which
represents the motion of the ball just after the ball leaves
the person’s hand?
b. 1.2 m/s/s
c. 1.4 m/s/s
d. 2.3 m/s/s
12. A ball is thrown straight up. When the ball reaches
the highest point its velocity is zero. Is the acceleration
also zero? Explain your answer and include a velocitytime graph sketch in your explanation.
a. Velocity and acceleration are both upward.
b. Velocity and acceleration are both downward.
c. Velocity is upward and acceleration is downward.
d. Velocity is downward and acceleration is upward.
9. Which graph represents the relationship between the
gravitational acceleration of a falling body and the
mass of the body?
2
13. The graph shows the acceleration of a car over time.
Phy.1.2.1 Analyze forces and systems of forces
graphically and numerically using vectors, graphs
and calculations.
17. A spring launcher is set on the edge of a laboratory
table. A ball is launched with a horizontal velocity v1
and falls to the floor a horizontal distance d1 from the
table. A second ball is launched from the spring with a
velocity three times that of vi. How does the horizontal
distance d2 of the second ball compare to d1 of the
first ball? Support your answer with an explanation
and reasoning for those choices you view as incorrect.
If the car starts from rest, what is the velocity of the
car after 5 seconds?
a. 0 m/s
c. 4.0 m/s
b. 0.80 m/s
d. 20. m/s
a. d2=d1
b. d2=d1/3
c. d2=1.73d1
d. d2=3d1
Phy.1.1.3 Analyze motion in two dimensions using
angle of trajectory, time, distance, displacement,
velocity and acceleration.
18. If a ball is thrown 4.5 m/s horizontally from a 94-m
cliff, how far has the ball fallen after 2.7 s? Neglect
air resistance
14. Which object will strike the ground first: one that is
thrown horizontally from a cliff or one that is
dropped simultaneously from the same height?
Support your answer with an explanation and
reasoning for those choices you view as incorrect.
a. 36 m
b. 48 m
c. 58 m
d. 71 m
19. Determine the net force on an object due to
concurrent forces of 25 N North and 10 N East.
Explain your calculations.
a. the one that is thrown
b. the one that is dropped
c. hit at the same time
d. cannot be determined
15. A ball is thrown with a velocity of 12.0 m/s at an
angle 30.0° above horizontal. Ignoring air resistance,
what is the ball’s vertical component of velocity?
a. 6.00 m/s
b. 6.93 m/s
c. 10.4 m/s
d. 20.8 m/s
16. An object is thrown off a cliff above level ground
with an initial horizontal velocity of 15 m/s. It takes 4
seconds for the object to reach the ground. If air
resistance is negligible, what is the height of the cliff?
Support your answer with an explanation and
calculations.
a. 60 m
b. 80 m
c. 120 m
d. 160 m
3
25. The diagram represents a block with two applied
forces. Ignoring friction, how much force pulls the
object to the left?
Phy.1.2.2 Analyze systems of forces in one dimension
and two dimensions using free body diagrams.
20. A football is kicked at an angle of 40 degrees above
the horizontal with a force of 5.0 N. (a) Draw a free
body diagram for the ball before, during and after
contact. (b) Determine the horizontal and vertical
components of the force. Explain your calculations.
a. 120 N
c. 620 N
b. 350 N
d. 720 N
26. This diagram represents a 1.9-kg object in static
equilibrium hanging from two strings, I and II. What
is the force on string II?
21. The diagram represents forces acting on a block that
accelerates 6.0 m/s/s on a frictionless surface. What
is the mass of the block?
a. 2.0 kg
b. 4.0 kg
c. 12 kg
d. 72 kg
a. 28 N
c. 19 N
22. A 2.6-kg block rests on a plane inclined at 35° to the
horizontal. What is the frictional force acting on the
block?
a. 11 N
b. 15 N
c. 22 N
d. 26 N
b. 21 N
d. 17 N
27. A rope horizontally pulls a massive object lying on a
surface with friction with a constant velocity. What
describes the force on the rope?
23. A 2-kg body of mass is moving on a horizontal
frictionless surface with a velocity of 4 m/s. What is
the net force required to keep the body moving with
the same velocity and direction for 5 s?
a. 0 N
b. 2 N
c. 8 N
d. 20 N
24. A horizontal force acts on a block sliding on a
horizontal surface. The force of kinetic friction
between the block and the surface is 0.5F. If the
direction of the applied force is reversed, which is
true?
a. The magnitude of the net force on the block
increases.
b. The magnitude of the acceleration of the block
remains the same.
c. The kinetic energy of the block increases.
d. The velocity of the block remains the same.
a. equal to the frictional force
b. greater than the frictional force
c. equal to the weight of the object
d. greater than the weight of the
4
28. Draw free-body diagrams for the following examples
and label the forces. Examples: (a) Box sliding down
an incline plane, (b) a person pushing a lawn mower,
(c) two boxes attached to a pulley with box 1 resting
and box 2 hanging from the pulley (Atwood
Machine). Explain your diagrams.
Phy.1.2.4 Explain the effects of forces (including
weight, normal, tension, and friction) on objects.
32. A force FA pulls on a box with a mass of m on a
rough surface. W represents the weight of the box.
FN represents the normal force on the box, and Ffr
represents the frictional force.
Describe the relationship between the forces when
the box moves with (a) constant velocity, and (b)
constant acceleration.
Phy.1.2.3 Explain forces using Newton’s laws of
motion as well as the universal law of gravitation.
29. Two students are pushing a stalled car.
33. A block of mass M is motionless on a frictionless
inclined plane. The mass is attached to the wall with
a string. What represents the magnitude of the
tension T in the string?
What is the acceleration of the car?
a. 0.015 m/s/s
b. 0.020 m/s/s
c. 0.040 m/s/s
d. 0.059 m/s/s
30. A student pushes a 35-kg block on a frictionless,
horizontal surface with a horizontal force of 18 N. If
the block is initially at rest, what is the speed of the
block after the student pushes the block 20.1 m?
a. 2.3 m/s
c. 6.3 m/s
b. 4.5 m/s
d. 21 m/s
a. Mg sin θ
b. Mg tan θ
c. Mg cos θ
d. zero Newtons
31. The gravitational force between two masses is 1.0 x
103N. If the distance between the masses is doubled,
what gravitational force would exist?
a. 2.0 x 103 N
c. 2.5 x 102 N
b. 5.0 x 102 N
d. 1.0 x 102 N
5
38. Explain how centripetal acceleration occurs when an
automobile rounds a curve.
Phy.1.2.5 Analyze basic forces related to rotation in a
circular path (centripetal force).
34. An object travels around a 120-m radius circular
path at a constant 70 m/s. The centripetal force
on the object is 3.5 ×104 N. What is the mass of
the object?
a. 4.17 x 100 kg
b. 8.57 x 102 kg
4
c. 6.00 x 10 kg
d. 1.43 x 106 kg
39. A car travels at a constant speed on a flat, circular
track. Which factor, when doubled, will decrease the
centripetal force on the car?
a. mass of the car
b. weight of the car
c. velocity of the car
d. radius of the track
35. A person swings a stone attached to a string in a
circle over her head. The string makes one complete
revolution every second. The tension in the string is
FT. She increases the speed of the moving stone,
without changing the radius of the circle and the
string makes two revolutions every second. What is
the effect on the tension of the string? Support your
answer with an explanation and reasoning for those
choices you view as incorrect.
Phy.1.3.1 Analyze the motion of objects involved in
completely elastic and completely inelastic collisions
by using the principles of conservation of momentum
and conservation of energy.
a. The tension is unchanged
b. The tension decreases to half the original value
c. The tension increases to twice the original value
d. The tension increases to four times the original value
40. A 62 kg skater is skating due west at 3.0 m/s when
she collides with a 42 kg skater headed east at 12 m/s.
If they remain tangled together, what is their final
velocity?
36. An object moves in uniform circular motion, and the
centripetal force on the object is 4.0 N. If the mass
of the object decreases by a factor of 2, what will be
the centripetal force on the object?
a. 1.0 N
b. 2.0 N
c. 8.0 N
d. 16 N
37. The objects shown
at right are moving
in a horizontal,
uniform, circular
motion. Which
object experiences
the least centripetal
force?
41. A 40 kg physics student is riding a 1.5 kg
skateboard. He is traveling 2.8 m/s. The student
jumps off of the skateboard and the skateboard
immediately stops. What is the speed and direction
of the student’s jump? Support your answer with an
explanation and reasoning for your calculations
a. 2.8 m/s in the opposite direction as he was riding
b. 2.8 m/s in the same direction as he was riding
c. 2.9 m/s in the opposite direction as he was riding
d. 2.9 m/s in the same direction as he was riding
6
42. A 60-kg student on ice skates stands at rest on a
frictionless frozen pond and holds a 10-kg brick. He
throws the brick east with a speed of 18 m/s. What is
the resulting velocity of the student?
a. 3.0 m/s west
b. 3.0 m/s east
c. 18 m/s west
d. 18 m/s east
48. A 15.0 kg object, moving at 11 m/s, crashes into a
wall and is stopped in 0.075 s.
a. Determine the impulse and stopping force on the
object.
b. How would increasing the stopping time affect the
impulse and force on the object?
43. Explain why inelastic collisions do not break the law
of conservation of energy. What is meant by
“conserved in a system of objects”?
44. An object has a mass, m, and velocity, v. Which
change would make its momentum become onefourth as much?
49. What is the difference in momentum between a 53kg athlete running 3.58 m/s and a 880.-kg car
traveling 1.03 m/s?
a. 130 kgm/s
b. 720 kgm/s
c. 1,100 kgm/s
d. 2,100 kgm/s
a. Its mass becomes m/2, and its velocity becomes v/2.
b. Its mass remains m, and its velocity becomes v/2.
c. Its mass becomes m/3, and its velocity remains v.
d. Its mass becomes m/2, and its velocity remains 2v.
45. A 75-kg object traveling 15 m/s collides with and
sticks to a 315-kg object initially at rest. What is the
final velocity of the two objects?
a. 2.9 m/s
b. 3.6 m/s
c. 12 m/s
d. 19 m/s
50. A 2.0 x 102 g mass slides across a frictionless surface
with a velocity of 41 m/s. It hits a wall and bounces
back in the opposite direction at 22 m/s. If the
collision takes 4.0 x 10-4 s to occur, what force is
applied by the wall on the mass?
a. -9.5 x 103 N
b. -3.2 x 104 N
c. -9.5 x 106 N
d. -3.2 x 107 N
Phy.1.3.2 Analyze the motion of objects based on the
relationship between momentum and impulse.
46. A 3.0 ×103 -kg truck traveling at 20.0 m/s in a test
laboratory collides into a wall and comes to rest in
0.10 s. What is the magnitude of the average force
acting on the truck during the collision?
a. 1.5 × 101N
b. 1.5 × 103N
c. 6.0 × 103N
d. 6.0 × 105N
Phy.2.1.1 Interpret data on work and energy
presented graphically and numerically.
51. A horizontal force, F, is used to pull a 5.0-kg block
across a floor at a constant speed of 3.0 m/s. The
frictional force between the block and the floor is 10
N. The work done by the force in 1 minute is most
nearly
47. A 13-N east horizontal force acts in the same
direction as a 6.4-kg block as it slides 2.5m s on a
frictionless, horizontal surface for 2.1 s. What is the
speed of the block after force is applied?
a. 1.7 m/s
b. 4.3 m/s
c. 6.7 m/s
d. 7.2 m/s
a. 0 J
b. 30 J
c. 600 J
d. 1,800 J
7
52. A force moves an object in the direction of the force.
55. A 58-kilogram pole vaulter needs to vault a height of
6.0 m. Assuming that all his kinetic energy can be
used for the vault, what is the speed that the vaulter
must be traveling in order to clear this height?
Ignore elastic PE of the bent pole.
a. 9.8 m/s
b. 15 m/s c. 11 m/s d. 36 m/s
56. A 290-N force is used to compress a spring. The
spring constant of the spring is 5,880 N/m. How far
is the spring compressed?
a. 0.0050 m
b. 0.049 m
c. 0.31 m
d. 20. m
Using the force versus position graph shown,
determine the work done when the object moves
from 2.0 m to 4.0 m.
57. A 588-N person carrying 294 N of equipment starts
climbing a mountain that is 3,118 m high. What is
the minimum energy required for the person to climb
the mountain?
a. 2.81 × 105 J
b. 9.17 × 105 J
6
c. 1.83 × 10 J
d. 2.75 × 106 J
58. A student drops a 0.45-kg ball that hits the floor with
a speed of 5.3 m/s. If the velocity of the ball is 4.8
m/s when it hits the floor on the second bounce, how
much mechanical energy is lost during the first
bounce?
a. 0 J
b. 1.1 J
c. 4.8 J
d. 6.3 J
Phy.2.1.2 Compare the concepts of potential and
kinetic energy and conservation of total mechanical
energy in the description of motion of objects.
53. The diagram below shows a rock on the edge of cliff
where h is the height of the cliff. If the rock rolls off
the cliff, what is the kinetic energy of the rock just
before it hits the ground?
59. A pendulum swings back and forth up to a maximum
height of 1.52 m. Neglecting friction, what is the
speed of the pendulum at the lowest position?
a. 2.7 m/s b. 3.9 m/s c. 5.5 m/s
d. 30. m/s
Phy.2.1.3 Explain the relationship among work,
power and energy.
a. mgh
c. (1/2)mv2 + mgh
60. A student throws an object downward. The initial
kinetic energy of the object is 360 J. When the
object reaches the ground, the kinetic energy of the
object is 3 times the initial kinetic energy of the
object. What was the initial potential energy of the
object?
a. 360 J
b. 720 J
c. 1,100 J d. 1,400 J
b. (1/2)mv2
d. mgh - (1/2)mv2
54. A ball is released from the top of an inclined plane as
shown below. Ignoring friction, where will the
potential energy (PE)
and kinetic energy (KE)
of the ball be at a
maximum?
61. The chart represents the work output and the time to
do the work for four machines. For which machine
is the power output least?
a. I
b. II
c. III
d. IV
a. PE at J, KE at M
b. PE at K, KE at L
c. PE at L, KE at K
d. PE at M, KE at J
8
62. Which is a correct statement about the relationship
between work, energy and power?
67. Is there a difference between the velocity of a wave
moving along a string and the velocity of a particle
of the string? Explain your answer.
a. Work transfers energy. Power is the rate at which
work is done or energy transferred.
b. Work is only done when an object is moved. Energy
and power are the same quantity.
c. Power is measure of how much work can be done.
Energy is a measure of the time interval in which the
work is done.
d. Energy and power are a measure of the amount of
force while work is related only to the distance an
object moves.
68. A sound wave of 410Hz travels through air at 335
m/s. (a) Determine the wavelength. (b) If the
frequency doubled, what would be the resulting
wavelength and wave speed? (c) What characteristic
of the wave is a measure of energy transmitted?
63. What is the maximum velocity at which a 25-W
motor can lift a 8.5 kg object upward?
a. 0.30 m/s
b. 2.9 m/s
c. 7.6 m/s
d. 29 m/s
64. A machine lifts a 35-kg object 20.0 m in 2.0 s. How
much power is produced by the machine to lift the
object?
a. 350 W
b. 890 W
c. 3,400 W
d. 6,900 W
65. How much power is required to lift a 12-Newton box
at 4.5 m/s?
a. 2.6 W
b. 5.4 W
c. 44 W
d. 54 W
69. What is the frequency of a wave with a speed of 10
m/s and wavelength of 20 m?
a. 0.5 Hz
b. 2 Hz
c. 30 Hz
d. 200 Hz
Phy.2.2.1 Analyze how energy is transmitted through
waves, using the fundamental characteristics of
waves: wavelength, period, frequency, amplitude,
and wave velocity.
70. This diagram represents a wave. If each point on the
wave takes 0.020 s to travel from X to Y, what is the
period of the wave?
66. The diagram below represents two pulses moving
toward each other on a rope. What occurs when the
pulses meet?
a.0.0080 s
b. 0.045 s
c. 0.18 s
d. 0.26 s
Phy.2.2.2 Analyze wave behaviors in terms of
transmission, reflection, refraction and interference.
71. The frequency of a wave is 5.1 ×1014 Hz. The speed
of a wave in a certain medium is 2.1 ×108 m/s. What
is the index of refraction of the medium?
a. 0.41
b. 0.73
c. 1.4
d. 2.4
9
72. How will a ray of light be affected as it passes from
air into water?
a. Its frequency and wavelength will increase.
b. Its frequency and wavelength will decrease.
c. Its frequency and unchanged but its wavelength
increases.
d. Its frequency is unchanged but its wavelength
decreases.
77. Compare sound and light waves in terms of the
following: (a) how they are produced, (b) wave
speed, (c) interference.
73. Draw wave pulses that demonstrate destructive and
constructive interference. Explain these sketches by
discussing wave displacement, direction, and
amplitude.
Phy.2.3.1 Explain Ohm’s law in relation to electric
circuits.
78. If the amount of charge that flows through a circuit
depends on how much the metal wire resists the flow
of charge, describe the mathematical relationship
between current and resistance.
74. A student places a piece of glass over a tank of
water. What happens to the speed of a light ray that
shines from air through glass into the water?
a. increases in glass and water
b. decreases in glass and water
c. increases in glass, then decreases in water
d. decreases in glass, then increases in water
75. A light ray traveling through air is incident on a pool
of water. If the light has an angle of incidence of
30.6°, what is the angle of refraction in the water?
a. 22.5o
b. 30.6o
c. 42.6o
d. 48.8o
79. If all bulbs and power sources shown are identical,
which circuit contains only 2 lit bulbs?
Phy.2.2.3 Compare mechanical and electromagnetic
waves in terms of wave characteristics and behavior
76. What will most likely happen when a ringing bell is
placed inside a bell jar connected to a vacuum pump?
a. The sound intensity of the bell will increase.
b. The sound intensity of the bell will decrease.
c. The frequency of the sound will increase.
d. The speed of the sound will increase.
10
80. This diagram represents a DC circuit. Each
resistor has a value of 5.1 Ω.
Phy.2.3.2 Differentiate the behavior of moving
charges in conductors and insulators.
84. Which is least likely to affect the resistance of an
electric circuit?
a. the length of the wire
b. the insulator on the wire
c. the cross-section of the wire
d. the resistivity of the wire
If R2 is removed from
the circuit, how much
current will flow
through the circuit?
a. 1.2 A
c. 2.4 A
b. 1.6 A
d. 4.8 A
85. In a good insulator, what is most likely true of
electrons?
a. They are free to move around.
b. They are held close to the nucleus.
c. They move from the conductor to the insulator.
d. They move from the insulator to the conductor.
81. In the diagram at
right, all light bulbs
are identical. In which
circuit would the light
bulbs be the dimmest?
86. What happens when a positively charged rod touches
a neutral metal sphere?
a. Protons move from the sphere to the rod.
b. Protons move from the rod to the sphere.
c. Electrons move from the sphere to the rod.
d. Electrons move from the rod to the sphere.
Phy.2.3.3 Compare the general characteristics of AC
and DC systems without calculations.
87. How are AC and DC current different?
a. Alternating current produces a flow of protons,
while direct current produces a flow of electrons.
b. Alternating current steadily flows in one direction,
while direct current flows in two directions.
c. Direct current is produced by an electric generator,
while alternating current is produced by a battery.
d. Direct current flows in one direction, while
alternating current reverses direction many times
per second.
82. Why would a current exist in an electric circuit?
a. because the electrons collide with other particles in
the conductor
b. because the electrons collide with other particles in
the insulator
c. because an electric potential difference exists across
the ends of the circuits
d. because the amount of charge is reduced on the
electrons
Phy.2.3.4 Analyze electric systems in terms of their
energy and power.
88. The CD player plugged into the auxiliary outlet in
Ellen’s car has a resistance of 6.0 Ω. a) How much
current does the CD player draw when it is run off
the car’s 12 V battery? b) How much power does the
CD player use?
83. In the circuit shown, a
voltage of 6 V pushes
charge through two
resistors of 3Ω each,
what is the current in
the circuit?
a. 1 A
c. 3 A
b. 2 A
d. 6 A
11
89. How is electric power and electrical energy related?
a. Electric power is the rate that electrical energy is used
to do mechanical or thermodynamic work.
b. Electrical energy is randomly reduced by electric
power to perform work.
c. Electric energy is transferred by an insulator which
produces electrical power for heat to operate
machines.
d. Electric power increases electrical energy when
transferred through a resistor in a circuit.
94. A student wants to measure the current flowing
through and the voltage across R1 in the circuit.
Which configuration is correct?
Phy.2.3.5 Analyze systems with multiple potential
differences and resistors connected in series and
parallel circuits, both conceptually & mathematically,
in terms of voltage, current and resistance.
Phy.3.1.1 Explain qualitatively the fundamental
properties of the interactions of charged objects.
90. The diagram
represents a DC
circuit. What is the
voltage of the battery
when the ammeter
reads 4.0 amperes?
a. 0.22 V
b. 1.0 V
c. 4.5 V
d. 16 V
91. The diagram
represents a DC
circuit. The total
resistance of the
circuit is 10.5 Ω. R2
and R3 each has the
same resistance of
5.0 Ω. What is R1?
a. 4.0 Ω
b. 5.0 Ω
95. A student combs his hair with a plastic comb, and
the hair becomes positively charged. What is the net
charge of the comb and the hair and the direction of
the charge transfer?
a. Protons move from the comb to the hair, and the total
charge of the hair and the comb is zero.
b. Electrons move from the hair to the comb, and the
total charge of the hair and the comb is zero.
c. Protons move from the comb to the hair, and the total
charge of the hair and the comb is positive.
d. Electrons move from the hair to the comb, and the
total charge of the hair and the comb is negative.
c. 8.0 Ω
d. 10.0 Ω
96. Explain why small pieces of paper are attracted to a
comb that has been rubbed through hair.
92. The diagram represents a DC circuit. What is the
total resistance of the circuit?
a. 25 Ω
c. 39 Ω
b. 28 Ω
d. 58 Ω
97. What does it mean to say that “charge is conserved
in a closed system”? Your answer should include
an example electrostatic system and explanation of
the interaction.
93. What is the equivalent resistance of a 4.0-Ω resistor,
a 5.0-Ω resistor and a 6.0-Ω connected in parallel?
a. 0.62 Ω
b. 5.0 Ω
c. 1.64 Ω
d. 3.5 Ω
12
Phy.3.1.2 Explain the geometries and magnitudes of
electric fields.
Phy.3.1.4 Explain the mechanisms for producing
electrostatic charges, including charging by friction,
conduction, and induction.
98. Which is true about electric field lines?
a. They form a counter-clockwise circle around
positive charges.
b. They form a clockwise circle around positive
charges.
c. They radiate outward from negative charges.
d. They radiate outward from positive charges.
103. What will be the effect of a negatively charged rod
touching a neutral electroscope?
a. The leaves will fall.
b. The electroscope will become positively charged.
c. There will be no change.
d. The leaves will spread apart.
99. What determines the strength of an electric field?
104. How does charging by conduction and induction
occur during a thunderstorm?
Phy.3.1.3 Explain how Coulomb’s law relates to the
electrostatic interactions among charged objects.
Phy.3.1.5 Explain how differences in electrostatic
potentials relate to the potential energy of charged
objects.
100. What is the electrostatic force of attraction
between a proton and an electron that are
separated by 3.25 x 10 -7 m?
a. 1.0 x 10-7N
b. 1.5 x 10-7N
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c. -1.8 x 10 N d. -2.2 x10-15N
105. The electric field intensity between two charged
plates is 3.00 x 104 N/C. The plates are 0.0820 m
apart. What is the electric potential difference
between the plates?
a. 1.50 x 103 V
b. 1.75 x 103 V
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c. 1.89 x 10 V
d. 2.46 x 103 V
101. The diagram represents three charged particles
arranged in a line. Describe the forces acting on
particle 3 and calculate the magnitude and direction
of the net force.
106. The diagram shows a positive test charge near a
positive point charge.
What happens if a positive test charge moves from
point A to point B in the electric field? Explain your
answer in reference to: potential energy, electric
potential and force.
102. Two charged particles are 0.080 m apart. They are
moved until the force between them is 16 times
greater. How far apart are the charges?
a. 0.0050 m
b. 0.020 m
c. 0.040 m
d. 0.16 m
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Phy.3.2.1 Explain the relationship between magnetic
domains and magnetism.
Phy.3.2.3 Explain how transformers and power
distributions are application of electromagnetism.
107. Explain how an un-magnetized iron bar becomes
magnetized when placed in a magnetic field. Your
answer should include a diagram to illustrate
magnetic domains and an explanation of their origin.
110. The diagram represents a simple transformer.
Explain how a step-down transformer is used to
change the voltage of power lines from 220 kV to an
output voltage of 110V for electrical outlets inside
homes.
Phy.3.2.2 Explain how electric currents produce
various magnetic fields.
108. The diagram shows the magnetic field around a
current bearing wire.
111. How does the magnetized strip on the credit card
work?
Explain the relationship between the electric current
in the wire and the magnetic field (both magnitude
and direction).
112. Explain the process of electromagnetic induction
involved in electric generators.
109. If the current in a wire is doubled, what happens to
the strength of the magnetic field?
a. Magnetic field strength is half of the original
value.
b. Magnetic field strength is one-third of the
original value.
c. Magnetic field strength is the same.
d. Magnetic field strength is double the original
value.
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