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Questions and Answers
What is the unit of work?
What is the unit of work?
- Joule (J) (correct)
- Watt (W)
- Kilogram (kg)
- Newton (N)
When the force and displacement are perpendicular to each other, the work done is?
When the force and displacement are perpendicular to each other, the work done is?
- Positive
- Negative
- Depends on the magnitude of the force
- Zero (correct)
If a force of 50 N is exerted in the direction of displacement of 10 m, the work done is?
If a force of 50 N is exerted in the direction of displacement of 10 m, the work done is?
- 5 J
- 100 J (correct)
- 50 J
- 500 J
In Example 1, when the horse exerts a force of 400 N at an angle of 20° and moves the barge 1.0 km, the work done is?
In Example 1, when the horse exerts a force of 400 N at an angle of 20° and moves the barge 1.0 km, the work done is?
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When a 5-kg weight is suspended in the air by a strong cable, the work done in suspending the weight is?
When a 5-kg weight is suspended in the air by a strong cable, the work done in suspending the weight is?
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