Download Name

Name: _______________________________
Class Period: _____
Force and Motion Post Test
1.
What is the speed of a runner who finishes a 100 m dash in 9.6 s.
2.
What is the difference between speed and velocity?
3.
What is acceleration?
4.
A student wearing in-line skates accelerates from 1.0 m/s to 6.0 m/s in 2 s. What is the acceleration
of the skater?
5.
What does a curved line on a distance-versus-time graph tell you?
6.
What is the unit for velocity?
7.
Forces have both __________ and ________________.
8.
What happens when an unbalanced force acts on an object?
9.
What causes an object to change its motion?
10.
If two students push a box with a force of 5 N each in the same direction, and there is no other
unbalanced force on the box, what is the magnitude of the net force on the box?
11.
If two students each push a box with a force of 5 N in opposite directions, and there is no other
unbalanced force on the box, what is the magnitude of the net force exerted on the box?
12.
If an object on a level surface weighs 5 N and stays at rest when a force is applied to it sideways,
what is the force of friction on the object?
13.
A ball with a weight of 2 N hangs from a spring without moving. Then you pull the ball downward
with a force of 3 N and hold it there. What is the force of gravity on the ball?
14.
What is the acceleration of a 24 kg object if a force of 7.44 N acts on it?
15.
A 10 kg object and a 2 kg object fall toward Earth with an acceleration of 9.8 m/s2. What is true
about the force of gravity on the two objects?
16.
Newton’s first law of motion applies to what types of objects?
17.
A student pushes a 3.0 kg textbook across his desk with a force of 1.5 N. What is the acceleration of
the book? (F = ma)
18.
Two objects that have different masses are falling toward Earth in a vacuum. How do the
accelerations of the objects compare?
19.
List examples of three types of acceleration?
20.
Calculate the speed of a bicyclist who rides 42 m in 14 s along a straight road. (S = d/t)
21.
During a tug-o-war the children on the left are pulling on the rope with a force of 140 N. The
children on the right are pulling on the rope with a force of 280 N. What is the magnitude and
direction of the net force on the rope?
22.
Seatbelts in cars keep people in their seats during accidents. Why do people need seatbelts?
23.
As the paddles in a canoe move backward, the paddles exert a force on the water in a backward
direction. According to Newton’s third law of motion, what else happens?
24.
What forces act on an apple resting on a table?
25.
A student pulls a bag with a force of 30 N. The force of friction between the bag and the floor is 15
N. What is the net force on the bag?
26.
A toy car keeps rolling at a constant speed when you turn it at an angle. What happens to the
velocity of the car?
27.
A student pushes two boxes across the floor. The student applies 20 N of force to the first box and
60 N of force to the second box to get the same acceleration. How do the masses of the boxes
compare?
28.
How could a student increase the velocity of an object?
29.
What two things does gravity depend on?
30.
What is the force of a 5 kg bowling ball with an acceleration of 5.0 m/s2?
31.
Which object has the greatest inertia a big rock or a small pebble of the same material?
32.
What kind of force is exerted on an object with a net force of zero?
33.
Sandra rides a train a distance of 250 kilometers. The entire trip takes a total of 5 hours. What is the
average speed of the train.
34.
An object is moving toward the north for a period of 5 seconds. When it begins moving, the object
has a velocity of 305 meters per second to the north. The ending velocity of the object is 40 meters
per second to the north. What is the average acceleration of the object?
35.
Put these in order from least to greatest friction: Sand, ice, wood floor, carpet
36.
What determines the gravitational attraction between two objects?
37.
What happens to an object moving in the same direction as the net force?
38.
What happens to an object if the forces acting upon it are unbalanced?