Question

WHY THE WORK DONE BY THE FIELDER IS NEGATIVE WHEN HE CATCHES THE BALL ??

Answer 1

Explanation:

because he provides a negative acceleration to ball by applying a force against the motion of the ball

Answer 2

Answer:

To catch a ball, the fielder has to stop the ball. This means, force is applied against the motion of the ball. So, between the fielder applies force on the ball and the ball comes to rest, the ball moves in the direction opposite to the direction of force. Thus work is negative.