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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

0.5 m/sec
1.5 m/sec
2.5 m/sec
3.5 m/sec
4.5 m/sec.

Correct Answer: 2.5 m/sec

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