A ball of mass m strikes the fixed inclined plane after falling through a height h. If it rebounds elastically, the impulse on the ball is :
A
2m cos θ 
B
2m cos θ 
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Here e = 1
if ball rebound elastically
v LOI = u LOI
∴ Along line of impact momentum conservation
= 2mu
Alog u LOI = u cos θ
= 
J = 2m cos θ. 
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