# Multiple-choice Physics Competency Test

15 Questions | Total Attempts: 112  Settings  To pass this test a score of 80% or higher is needed.

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• 1.
All of the following require the application of a net force, except?
• A.

To change an object from a state of rest to a state of motion

• B.

To maintain an object in motion at a constant velocity

• C.

To change an objects speed w/out changing its direction of motion

• D.

To maintain an object in uniform circular motion

• E.

To accelerate an object

• 2.
A rocket flies at constant velocity straight up. whats the direction of the net force on the rocket?
• A.

Up

• B.

Down

• C.

Can not be determined w/out knowing rocket mass

• D.

Cant be determined w/out knowing the wind resistance

• E.

None of the previous

• 3.
A hot rod starting at rest and uniformly accelerating covers a distance of 400 meters in 15 seconds. What is the acceleration to two significant figures?
• A.

3.6 m/s^2

• B.

4.4 m/s^2

• C.

2.2 m/s^2

• D.

27 m/s^2

• E.

None

• 4.
A ball is thrown up at 15 m/s, whats the velocity after 3.0 seconds?
• A.

14 m/s up

• B.

14 m/s down

• C.

44 m/s up

• D.

44 m/s down

• E.

None

• 5.
A 20.0 kg block on a smooth horizontal surface is acted upon by two horizontal forces: a force of 20 N acting to the left and a force of 60 N to the right? The acceleration fo the block will be
• A.

3.0 m/s^2 to the right

• B.

4.0 m/s^2 to the right

• C.

40 m/s^2 to the right

• D.

2.0 m/s^2 to the left

• E.

None

• 6.
Which of the following units would be appropriate to describe force?
• A.

Kg*m/s^2

• B.

M/s^2

• C.

Kg/s

• D.

Kg*m/s

• E.

None

• 7.
A 0.15 kg ball traveling with a speed of 50 m/s is brought to rest in a catcher's mitt with an average force of 75 N. What is the maginutde of the impulse exerted by the mitt on the ball?
• A.

75 Ns

• B.

11.3 Ns

• C.

3750 Ns

• D.

7.5 Ns

• E.

None

• 8.
A child plays on a see-saw with her father. The child has a weight of 250 N and is seated 2.5 m from the axis of rotation. Her father balances her when he is seated 0.80 m from the axis. The fathers weight is
• A.

250 N

• B.

500 N

• C.

667 N

• D.

725 N

• E.

750 N

• 9.
A book weighing 10 N is held at rest in the palm of the hand. The reaction to the force of the hand on the book is a force of
• A.

10 N exerted by the Earth on the book

• B.

10 N exerted by the book on the Earth

• C.

10 N exerted by the book on the hand

• D.

0 N

• E.

9/8 m/s^2 in the downward direction arising from the force of the eart

• 10.
A ball is projected upward with an initial velocity of 5 m/s. It will reach its maximum height in approximately
• A.

0.5 s

• B.

1.0 s

• C.

49 s

• D.

2.0 s

• E.

0.0 s

• 11.
If an astronaut landed on a planet that was three times the diameter and three times the mass of earth, how would his weight there compare with that on earth?
• A.

Same

• B.

Three times as much

• C.

One ninth as much

• D.

One third as much

• E.

None

• 12.
Temperature can be described as
• A.

Heat

• B.

A measure of the average kinetic energy of the molecules of a substance

• C.

A fluid that flows between a hot and cold object

• D.

A physical quantity measured in calories

• E.

Energy transfer as a result of a temperature difference

• 13.
• A.

Attracts it toward the N pole of the magnet

• B.

Attracts it toward the S pole of the magnet

• C.

Repels it away from the N pole of the magnet

• D.

Repels it away from the S pole of the magnet

• E.

Theres no magnetic force on the charge

• 14.
A current of 2.5 A is flowing through a resistance of 18 Ohms. What is the voltage difference across this resistance?
• A.

1.5 V

• B.

6 V

• C.

45 V

• D.

115 V

• E.

None

• 15.
• A.

3 feet from you, but changed in size

• B.

3 feet from you, same size

• C.

6 feet from you, but changed in size

• D.

6 feet from you, same size

• E.

At the point where you are standing, same size