Name:    9th Grade Physics- Force Practice Test 1

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

1.

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. 0.008 watts c. 504 watts b. 125 watts d. 2000 watts

2.

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. 0.02 meters c. 50 meters b. 5,000 meters d. 510 meters

3.

 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

4.

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

5.

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

6.

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

7.

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

8.

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

9.

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

10.

 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

11.

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

12.

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

13.

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

14.

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

15.

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

16.

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. torque b. friction d. inertia

17.

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. 30 kg b. 10 kg d. The 10 kg, 20 kg, and 30 kg will fall at the same rate

18.

Determine the resulting force and direction for the diagram above.
 a. The object stays in the same place, 0 N net force c. The object will move left with 10 N of 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

19.

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. 2000 joules c. 1.25 joules b. 10 joules d. 0.8 joules

20.

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

21.

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

22.

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

23.

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. Left, 5 N c. Right, 5 N b. Right, 15 N d. Left, 15 N

24.

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