Question

Certain force acting on a 20 kg mass changes its velocity from 5 ms–1 to 2 m/s. Calculate the work done by the force.
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Answer 1

Answer:

Certain force acting on 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force. (E k)2 = (1 )/2x 20 — (2)2 = 40 J.