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A player stops a football weighing 0.5 k...

A player stops a football weighing 0.5 kg which comes flying towards him with a velocity of `10m//s`. If the impact lasts for `1//50`th sec. and the ball bounces back with a velocity of 15 `m//s`, then the average force involved is

A

250N

B

1250N

C

500N

D

625N

Text Solution

Verified by Experts

The correct Answer is:
D
Here `=0.5 kg ,u=-10 m//s,`
`t=1//50 s,v=+15 ms^(-1)`
Force `m=(v-u)//t=0.5 (10+15)xx50=625 N`
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