Question

certain force acting on a 10kg mass changes its velocity from 5m/s to 2m/s . calculate the work done by the force. (hint :F x S)

Answer 1

Work done = Change in kinetic energy
= 0.5m (v² - u²)
= 0.5 × 10 × (5² - 2²)
= 105 J

Work done by force is 105 J