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

0.4m/s

0.2m/s

0.1m/s

0.05m/s

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ERRORLESS -WORK, ENERGY, POWER & COLLISION-Assertion

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