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Four smooth steel balls of equal mass at...

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

Text Solution

Verified by Experts

The correct Answer is:
A
Velocity gets interchanged when masses are equal i.e. the last ball will move with the velocity of first ball.
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