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A mass of 100 g strikes the wall with sp...

A mass of 100 g strikes the wall with speed `5 m//s` at an angle as shown in figure and it rebounds with the same speed it the contact time is `2 xx 10^(-3) sec`. What is the force applied on the mass by the wall :

A

`250 sqrt3 N` to right

B

250 N to right

C

`250 sqrt3` N to left

D

250 N to left

Text Solution

Verified by Experts

The correct Answer is:
C
Change in momentum `= F xx t =` Impulse
`implies F = (2mvsin theta)/t = (2mvsin 60^@)/(t)`
`implies (2xx100 xx10^(-3) xx5 xxsqrt3/2)/(2xx10^(-3)) " " [:. sin 60^@ = sqrt3/2]`
`implies 250 sqrt3N` to left.
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