Physics
A force ‘F’ moves a load from A to C as shown in the figure below. For the calculation of the work done, which of these lengths would you use as the displacement?
- 3m
- 4m
- 5m
- 7m
Work, Energy & Power
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Answer
5m
Reason — The amount of work done by a force is equal to the product of the force and the displacement of the point of application of the force in the direction of force. In the diagram, the object moves from point A to point C in the direction of force F. The straight-line path from A to C is 5 m, which is the magnitude of the displacement vector. Hence, the correct length to use as displacement is 5 m.
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