PHYSICAL UNIVERSE W/ CONNECT
PHYSICAL UNIVERSE W/ CONNECT
15th Edition
ISBN: 9781308534718
Author: KRAUSKOPF
Publisher: MCG/CREATE
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Textbook Question
Chapter 3, Problem 1MC

Which of the following is not a unit of work?

  1. a. newton-meter
  2. b. joule
  3. c. kilogram-meter
  4. d. watt-hour
Expert Solution & Answer
Check Mark
To determine

The unit which is not the unit of work.

Answer to Problem 1MC

Option (c) is not the unit of work.

Explanation of Solution

Formula to calculate work is,

W=Fd

Here,

W is the work

F is the force

d is the distance

In SI unit, the unit of work is Joule (J)

Force is Newton (N)

Distance is meter (m)

Thus, the unit of work done is

Joule=Newton-meter

Formula to calculate power is,

P=Wt

Here,

W is the work

P is the power

t is the time

In SI unit, the unit of work is Joule (J)

Power is watt (W)

Time is hour

Thus, the unit of the work is,

Watt=JoulehourJoule=Watt-hour

Conclusion:

Since, the unit of the work is Joule, newton-meter and watt-hour. Therefore, the kilogram-meter is not the unit of work. Thus, option (c) is correct.

The unit of the work is newton-meter. Thus, option (a) is incorrect.

The unit of the work is Joule. Thus, option (b) is incorrect.

The unit of the work is watt-hour. Thus, option (d) is incorrect.

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Chapter 3 Solutions

PHYSICAL UNIVERSE W/ CONNECT

Ch. 3 - Prob. 11MCCh. 3 - The formula 12 mv2 for kinetic energy a. is the...Ch. 3 - A spacecraft has left the earth and is moving...Ch. 3 - The upper limit to the speed of an object with...Ch. 3 - It is not true that a. light is affected by...Ch. 3 - Albert Einstein did not discover that a. the...Ch. 3 - The work done in holding a 50-kg object at a...Ch. 3 - The work done in lifting 30 kg of bricks to a...Ch. 3 - A total of 4900 J is used to lift a 50-kg mass....Ch. 3 - The work a 300-W electric grinder can do in 5.0...Ch. 3 - A 150-kg yak has an average power output of 120 W....Ch. 3 - A 40-kg boy runs up a flight of stairs 4 m high in...Ch. 3 - Car A has a mass of 1000 kg and is moving at 60...Ch. 3 - A 1-kg object has a potential energy of 1 J...Ch. 3 - A 1-kg object has kinetic energy of 1 J when its...Ch. 3 - The 2-kg blade of an ax is moving at 60 m/s when...Ch. 3 - The highest MA that can be obtained by a system of...Ch. 3 - A machine has a MA of 6.0. 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