Concept explainers
Which of the following is not a unit of work?
- a. newton-meter
- b. joule
- c. kilogram-meter
- d. watt-hour
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,
Here,
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
Formula to calculate power is,
Here,
In SI unit, the unit of work is Joule (J)
Power is watt (W)
Time is hour
Thus, the unit of the work is,
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
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