If a body of mass 2 kg is raised vertically through 2 m, then the work done will be:
Correct answer: B. 39.2 J
- A. 38.2 J
- B. 39.2 J
- C. 392.1 J
- D. 3.92 J
Explanation
Work = mgh = 2 × 9.8 × 2 = 39.2 J. Thus option B is correct.
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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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