# Kinetic And Momentum Energy Quiz Questions

32 Questions | Total Attempts: 158  Settings  .

Related Topics
• 1.
Which of the following is not a unit of work?
• A.

Newton-meter

• B.

Joule

• C.

Kilogram-meter

• D.

Watt-hour

• 2.
An object at rest may have
• A.

Velocity

• B.

Momentum

• C.

Kinetic energy

• D.

Potential energy

• 3.
A moving object must have which one or more of the following?
• A.

Potential energy

• B.

Kinetic energy

• C.

Rest energy

• D.

Momentum

• E.

B,c,d

• 4.
When the momentum of a moving object is increased, there must also be an increase in which one or more of the following of the object's properties?
• A.

Speed

• B.

Acceleration

• C.

Kinetic energy

• D.

Potential energy

• E.

A,c

• 5.
The total amount of energy (including the rest energy of matter) in the universe
• A.

Cannot change

• B.

Can decrease but not increase

• C.

Can increase but not decrease

• D.

Can either increase or decrease

• 6.
When the speed of a moving object is halved,
• A.

Its KE is halved

• B.

Its PE is halved

• C.

Its rest energy is halved

• D.

Its momentum is halved

• 7.
Two ball, one of mass 5 kg and the other of mass 10 kg, are dropped simultaneously from a window. When they are 1 m above the ground, the balls have the same
• A.

Kinetic energy

• B.

Potential energy

• C.

Momentum

• D.

Acceleration

• 8.
A bomb dropped from an airplane explodes in midair.
• A.

Its total kinetic energy increases

• B.

Its total kinetic energy decreases

• C.

Its total momentum increases

• D.

Its total momentum decreases

• 9.
The operation of a rocket is based upon
• A.

• B.

Pushing against the air

• C.

Conservation of linear momentum

• D.

Conservation of angular momentum

• 10.
A spinning skater whose arms are at her sides then stretches out her arms horizontally
• A.

She continues to spin at the same rate

• B.

She spins more rapidly

• C.

She spins more slowly

• D.

Any of the choices could be correct, depending on how heavy her arms are

• 11.
According to the principle of relatively, the laws of physics are teh same in all frames of reference
• A.

At rest with respect to one another

• B.

Moving toward or away from one another at constant velocity

• C.

Moving parallel to one another at constant velocity

• D.

All of these

• 12.
The formula 1/2mv^2 for kinetic energy
• A.

Is the correct formula if v is properly interpreted

• B.

Always gives too high a value

• C.

Is the low-speed approximation to the correct formula

• D.

Is the high-speed approximation to the correct formula

• 13.
A spacecraft has left the earth and is moving toward Mars. An observer on the earth finds that, relative to measurements made when the spacecraft was at rest, its
• A.

Length is shorter

• B.

KE is less than 1/2mv^2

• C.

Clocks tick faster

• D.

Rest energy is greater

• 14.
The upper limit to the speed of an object with mass
• A.

Depends on the mass

• B.

Corresponds to a KE equal to its rest energy

• C.

Is the speed of sound

• D.

Is the speed of light

• 15.
It is not true that
• A.

Light is affected by gravity

• B.

The mass of a moving object depends upon its speed

• C.

The maximum speed anything can have is the speed of light

• D.

Momentum is a form of energy

• 16.
Albert Einstein did not discover that
• A.

The length of a moving object is less than its length at rest

• B.

The acceleration of gravity g is a universal constant

• C.

Light is affected by gravity

• D.

Gravity is a warping of spacetime

• 17.
The work done in holding a 50-kg object at a height of 2 m above the floor for 10 s is
• A.

0

• B.

250 J

• C.

1000 J

• D.

98000 J

• 18.
The work done in lifting 30 kg of bricks to a height of 20 m is
• A.

61 J

• B.

600 J

• C.

2940 J

• D.

5880 J

• 19.
A total of 4900 J is used to lift a 50 kg mass. The mass is raised to a height of
• A.

10 m

• B.

98 m

• C.

960 m

• D.

245 m

• 20.
The work a 300-W electric grinder can do in 5.0 min is
• A.

1 kJ

• B.

1.5 kJ

• C.

25 kJ

• D.

90 kJ

• 21.
A 150-kg yak has an average power output of 120 W. The yak can climb a mountain 1.2 km high in
• A.

25 min

• B.

4.1 h

• C.

13.3 h

• D.

14.7 h

• 22.
A 40-kg boy runs up a flight of stairs 4 m high in 4 s. His power output is
• A.

160 W

• B.

392 W

• C.

40 W

• D.

1568 W

• 23.
Car A has a mass of 1000 kg and is moving at 60 km/h. Car B has a mass of 2000 kg and is moving at 30 km/h. The kinetic energy of Car A is
• A.

Half that of car B

• B.

Equal to that of car B

• C.

Twice that of car B

• D.

4 times that of car B

• 24.
A 1-kg object has a potential energy of 1 J relative to the ground when it is at a height of
• A.

0.102 m

• B.

1 m

• C.

9.8 m

• D.

98 m

• 25.
A 1-kg object has kinetic energy of 1 J when its speed is
• A.

0.45 m/s

• B.

1 m/s

• C.

1.4 m/s

• D.

4.4 m/s