9. A ball of mass m moving with a velocity '' rebounds from a wall, the colin assumed to be elastic and the force of interaction between the wall and ball as shown in figure. The value of F⁰ is
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your answer is
4mu/T mark me as brilliantest
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1
Area under the F-t graph gives the change in momentum of the body during that period.
∴ ΔP=
2
1
F
o
T
Also as the collision of ball with the wall is elastic, thus the ball colliding with the wall with initial speed v rebounds with the same speed u.
Thus the change in momentum of ball ΔP=mu−(−mu)=2mu
∴
2
F
o
T
=2mu ⟹F
o
=
T
4mu
answer = T/4mu
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