Question

Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.

Answer 1

Here, the fielder use a force to oppose the motion of the ball.

Thus, θ = 180°

Thus

Work done = force (F) x displacement (d) x cos 180°

= -F x d

(∵ cos 180° = -1)

Thus, work done is negative.