Work and Energy Quiz Chapter 13

Which of the following processes requires the most work?

• A 10 kg weight rests on a table.

• A person holds a 1 kg weight still with outstretched arms.

• A person lifts a 1 kg weight 1 m off the floor.

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NGSS.MS-PS3-2

A man pushes a crate along a factory floor by exerting a force of 55 N. If the crate moves a distance of 4.0 m, how much work does the man perform?

• 165 N

• 220 N

• zero

What are the units of power?

• watts

• horsepower

• joules per second

• All of the above

Which of the following is an example of a wheel and axle?

• a block and tackle

• a pulley

• a screwdriver

Which of the following is NOT a simple machine

• a lever

• a screw

• a pair of scissors

Which of the following statements about work and energy is not true?

• When work is done, energy is transferred or transformed.

• Energy may be defined as the ability to do work.

• Work and energy are always equal.

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NGSS.MS-PS3-5

Gravitational potential energy depends on

• the mass of the object.

• the height of the object.

• the acceleration due to gravity.

• All of the above

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NGSS.MS-PS3-2

A medicine ball has a mass of 5 kg and is thrown with a speed of 2 m/s. What is its kinetic energy?

• 100 J

• 10 J

• 500 J

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NGSS.MS-PS3-1

The kind of energy associated with atomic bonds is

• nuclear energy.

• light energy.

• chemical energy.

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NGSS.HS-PS1-4

A pendulum swings back and forth and has a kinetic energy of 400 J at a particular point in its path. Which of the following statements is not true?

• Both the kinetic and potential energy are decreasing.

• The minimum kinetic energy is zero.

• When the kinetic energy is zero, the potential energy will be 400 J greater.

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NGSS.MS-PS3-4

NGSS.MS-PS3-5