Name:_________________________
Part 1: Matching:
Directions: Match each term with the best formula or definition _____/10 Mastery____
1.
_C_Speed
a.
__y2-y1__
x2-x1
2.
_A___Velocity on a Distance-Time Graph
b.
3.
D_ Newton’s 2nd Law
4.
_B_Acceleration
c. D/t
1. _D_Distance:
d. F=ma
a. distance an object travels per unit of time
2. _B_Displacement:
b. the straight line between and object’s start point and end point
3. _ A ___Speed:
c. the tendency of an object to resist a change in motion
4. _ E__Velocity:
5. _ G ___Acceleration:
d. the length of the actual path an object takes
e. speed in a certain direction
6. __ C ___Inertia
f. any push or pull
g. rate of change in speed
LG 4.1: Define and calculate distance and displacement _____/5 Mastery____
1) Steve walks 3km due north to Andrea’s house. Then he and Andrea turn around and walk 7km due
south to Jerica’s house. What is Steve’s total displacement?
a)
b)
c)
d)
3km South
4km South
7km South
10km South
2. Alex walks east for 3 km, stops for a break, and then runs the same direction for 4 km before he stops.
a. What is his distance?_7km
b. What is his displacement?_ 7km East
3. Taylor rides her bicycle 20 km north, turns around, and then rides the bicycle 15 km back toward her starting
point.
What is her distance?__ 35km __What is her displacement?__ 5km North
4. If I run 345m in a circle and end up back where I started,
What is my distance? __345m What is my displacement? __0m
5. Cameron flies directly west for 13 km, then turns to the south and flies for another 30 km. He then flies east for
13 km before landing at the airport.
a. What is his distance?_ 56Km_ What is his displacement?_ 30km South
•LG 4.2: Define and calculate velocity _____/5 Mastery____
1. What is the difference between speed and velocity?
Velocity is speed in a specific direction
2. A dog take 8 seconds to run 20 meters. What is its average speed?
2.5m/s
3. For the graph below calculate the VELOCITY of the car at the following intervals:
a. T-0 and T-20_2.5m/s
b. T-20 and T- 40 0m/s
c. T-40 and T-60 _5m/s
During which intervals is the car moving at a constant velocity? T-0 and T-20, T-40 and T60
5. During which intervals is the car moving the fastest? T-40 and T-60
150
100
50
0
Distance (m)
200
4.
0
10
20
30
40
Time (s)
50
60
•LG 4.3: Define and calculate acceleration _____/5 Mastery____
1. Over 5 seconds, a car’s velocity increases from 0m/s to 15 m/s. What is the car’s acceleration?
a) 3m/s2
b) 5m/s2
c) 15m/s2
d) 45m/s2
2. While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile’s
acceleration? (Remember that a negative value indicates a slowing down or deceleration.)
-0.75 m/s2
3. A helicopter’s speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter?
7 m/s2
4. Acceleration is:
a.
b.
c.
d.
The average speed of an object
The rate of change of velocity
The difference between and object’s starting and ending position
Speed with direction
5. What is the difference between acceleration and velocity?
ACCELERATION IS THE RATE OF CHANGE IN VELOCITY
•LG 4.4: Describe and identify forces _____/5 Mastery____
1. Match the force with the description:
a. 5 Normal
1. a force that pulls objects towards each other
b. 1 Gravity
2. exerted by the surface as an object moves across it and opposes the
motion
c. 4 Applied
3. acts on objects moving the air and opposes the motion
d. 2 Friction
4. applied by an object or a person
e. 3 Air resistance
5. support force exerted on an object on any surface; always 90
degrees to the horizontal
2. a. Name the forces on the skateboard below (there are 4)
Friction, Applied, Gravity , Normal
b. Draw a free-body diagram for the skateboard above
Fg
Ff
Fa
Fn
3. a. What is the NET FORCE on the bunny below? 0N
a. Is the force on the bunny BALANCED OR UNBALANCED?
10
N
5N
15N
4. a. What is the NET FORCE on the bunny below? 25N
b. Is the force on the bunny BALANCED OR UNBALANCED?
45N
20N
5. a. The two bunnies above have different masses.
If we dropped both of them from the same height at the same time on the moon, which would hit the ground first?
They would hit at the same time
b. On Earth, the bunny in the picture above has a mass of 10g. What will its mass be in outer space?
10g
c. If you drop a full water bottle and a water bottle of the same size and shape but empty at the same time from
the same height. What is the acceleration for each of the water bottles? 9.8m/s2
LG 4.5: Explain and apply Newton’s Laws of Motion _____/5 Mastery____
1. Use Newton's second law of motion to calculate the acceleration of a 7 kg mass if a force of 68.6 N acts on it?
a. 0.1 m/s/s
c. 68.6 m/s/s
b. 9.8 m/s/s
d. 480.2 m/s/s
2. You sitting in a chair is an example of Newton's
a. second law.
c. second and third laws.
b. first and third laws.
d. first and fourth laws.
3. Newton's third law of motion states that whenever one object exerts a force on a second object,
a.
the second object exerts an equal and opposite force on a third object.
b.
the first object is unaffected by that force.
c.
the second object exerts an equal and opposite force on the first object.
d.
the second object exerts a less powerful force on the first object.
4. A 5 kg object has less inertia than a ____ object. (1 kg = 1,000 g)
a.
4 kg
c. 2 kg
b.
6,000 g
d. 1,500 g
5. Newton's second law of motion states that an object's acceleration
a.
increases as its mass decreases and as the force acting on it increases.
b.
decreases as its mass decreases and as the force acting on it increases.
c.
increases as its mass increases and as the force acting on it increases.
d.
decreases as its mass increases and as the force acting on it increases.