A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him?
Correct answer: C. 100 J
- A. 50 J
- B. 150 J
- C. 100 J
- D. 200 J
Explanation
Horizontal displacement does no work (force vertical component does no work horizontally if force vertical). Work against gravity = F × vertical distance = 10×10 = 100 J. Total work = 100 J.
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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