Question

Calculate the work done in lifting a body of mass 10 kg to a height of 10m above the ground

Answer 1

Answer -

• Mass of the body, m = 100kg. Height, h = 10m. Acceleration due to gravity, g = 10m/s. (i) Work done, w = mgh. = 100 × 10 × 10. = 10,000 J. (ii) Potential energy, PE = Work done (At any point above the surface of the ground, the work done in raising the body is numerically equal to the potential energy)

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Answer 2

Explanation:

Work done = 100 × 10 × 10 = 10000 J