1.

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

Answer»

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.



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