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9th Grade Physics- Force Practice Test 1



Multiple Choice
Identify the choice that best completes the statement or answers the question.

Force = ma, mass = F/a, acceleration = F/m
 

 1. 

A force that opposes motion between two surfaces that are in contact
a.
momentum
c.
inertia
b.
friction
d.
force
 

 2. 

Friction maybe defined as the
a.
the tendency of a force to rotate an object about an axis.
c.
resisting the motion of solid surfaces, fluid layers, and/or objects sliding against each other.
b.
the resistance of any object to a change in its state of motion or rest.
d.
influence that causes an object to  change in speed, change in direction, or change in shape.
 

 3. 

The product of the mass and velocity
a.
inertia
c.
friction
b.
momentum
d.
force
 

 4. 

mc004-1.jpg

Find the mass of the object above.
a.
8 kg
c.
4 kg
b.
1/4 kg
d.
16 kg
 

 5. 

mc005-1.jpg

Find the force applied to the object above.
a.
2.5 N
c.
10 N
b.
2 N
d.
2/5 N
 

 6. 

mc006-1.jpg

Find the force applied to the object above.
a.
2/3 N
c.
1.5 N
b.
4 N
d.
24 N
 

 7. 

When two forces act in the same direction the net force is
a.
the sum of the forces
c.
divided by the two forces
b.
the difference of the two forces
d.
multiplied by the two forces
 

 8. 

mc008-1.jpg

Four different students, student A, B,C, and D, pull from four different directions.  Which student will end up pulling the blue square in their direction?
a.
Student A
c.
Student C
b.
Student B
d.
Student D
 

 9. 

A push or pull exerted on an object
a.
momentum
c.
friction
b.
inertia
d.
force
 

 10. 


Car
Mass (kg)
Force (N)
A
2
20
B
4
20
C
6
20
D
8
20
Analyze the table above to determine the car with the MOST amount of acceleration.
a.
A
c.
C
b.
B
d.
D
 

 11. 

A student pushes a cart down a road with a force of 10 Newton’s, and in doing so does 500 joules of work.  How far did the student push the box?
a.
5,000 meters
c.
0.02 meters
b.
50 meters
d.
510 meters
 

 12. 

mc012-1.jpg
One force pulls from the left at 10 N, and one force pulls in the opposite direction at 5 N.  What is the net force and in which direction?
a.
Right, 15 N
c.
Left, 5 N
b.
Left, 15 N
d.
Right, 5 N
 

 13. 

Each year scouts compete in soap box derby races.  The races consist of a wooden car with four wheels.  The car rolls down hill with out the aide of anything but gravity.  The winners always have well lubricated axles and or bearings.  The lubrication helps prevent __________ which speeds the car up.
a.
momentum
c.
inertia
b.
friction
d.
torque
 

 14. 

mc014-1.jpg

Find the force applied to the object above.
a.
40 N
c.
10 N
b.
20 N
d.
1/10 N
 

 15. 

The tendency of an object to resist being moved or change in speed
a.
force
c.
momentum
b.
inertia
d.
friction
 

 16. 

mc016-1.jpg
Determine the resulting force and direction for the diagram above.
a.
The object will move left with 10 N of force
c.
The object stays in the same place, 0 N net force
b.
The object will move right with 10 N of force
d.
The object will stay in the same place with 10 N net force
 

 17. 

mc017-1.jpg

Find the acceleration of the object above.
a.
24 m/s/s
c.
6 m/s/s
b.
12 m/s/s
d.
1/6 m/s/s
 

 18. 

mc018-1.jpg
An object exerts 25 Newton’s onto the surface of a table, how much Force is exerted upward by the table?
a.
Not enough information
c.
0 N
b.
20 N
d.
25 N
 

 19. 

mc019-1.jpg

Find the acceleration of the object above.
a.
1/6 m/s/s
c.
6 m/s/s
b.
24 m/s/s
d.
96 m/s/s
 

 20. 

mc020-1.jpg
A 10kg, 20 kg, and a 30 kg ball fall in a vacuum tube from the same height, with no air resistance.  Which object(s) will fall the fastest?
a.
20 kg
c.
10 kg
b.
The 10 kg, 20 kg, and 30 kg will fall at the same rate
d.
30 kg
 

 21. 

A student helps his mother bring groceries into the house from the car, if the student does 500 joules of work in 4 seconds, how much power did the student use?
a.
125 watts
c.
0.008 watts
b.
504 watts
d.
2000 watts
 

 22. 

A student pushes her friend on a skateboard with a force of 40 Newton’s for about 50 meters, Calculate the amount of work.
a.
1.25 joules
c.
10 joules
b.
2000 joules
d.
0.8 joules
 

 23. 


Car
Mass (kg)
Force (N)
A
10
10
B
10
20
C
10
30
D
10
40
Analyze the table above to determine the car with the LEAST amount of acceleration.
a.
A
c.
C
b.
B
d.
D
 

 24. 

mc024-1.jpg

Find the mass of the object above.
a.
50 kg
c.
2 kg
b.
10 kg
d.
1/2 kg
 



 
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