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A cricket fielder pulls his hands backward while catching a fast ball. This action reduces the force on his hands because it
AIncreases the momentum the moving ball already carries
BDecreases the contact time with the moving ball
CReduces the total mass of the ball being caught
DIncreases the contact time for the same momentum change
Answer & Solution
Correct answer: D. Increases the contact time for the same momentum change
1. The ball's change in momentum (impulse) is fixed once it is caught.
2. Impulse J = F x t, so for a fixed J, force F is inversely proportional to time t.
3. Pulling the hands back lengthens the contact time t, which lowers the force F felt.
4. Rule out option C: a shorter contact time would increase, not reduce, the force.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 1 "Laws of Motion", p.14_
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