Question

Four smooth steel balls of equal mass at rest are free to move along a straight line without friction. The first ball is given a velocity of 0.4 m/s . It collides head on with the second elastically, the second one similarly with the third and so on. The velocity of the last ball is
A. 0.4m/s
B. 0.2m/s
C. 0.1m/s
D. 0.05m/s

Answer 1

Correct Answer - A

Answer 2

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