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Applied Mechanics

Q1: A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be

A 0.5 m/sec

B 1.5 m/sec

C 2.5 m/sec

D 3.5 m/sec

E 4.5 m/sec

ANS:C - 2.5 m/sec

If only one object/body exist then use,

e=v/u.
0.5=v/5,
v=0.5*5=2.5 m/s.



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