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 steel ball of radius 2 cm is at rest on a frictionless surface. Another ball of radius 4 cm moving at a velocity of 81 cm//see collides elast cally with first ball. After collision the smaller ball moves with speed of

Three balls of masses m_(1), m_(2) and m_(3) are lying in a straight line. The first ball is moved with a certain velocity so that it strikes the second ball directly and itself comes to rest. The second ball collides with the third and is itself reduced to rest. If e is the coefficient of restitution for each ball, write down the relation of m_(3) in terms of m_(1) and m_(2) .

Three balls of masses m_(1), m_(2) and m_(3) are lying in a straight line. The first ball is moved with a certain velocity so that it strikes the second ball directly and itself comes to rest. The second ball collides with the third and is itself reduced to rest. If e is the coefficient of restitution for each ball, write down the relation of m_(3) in terms of m_(1) and m_(2) .

A steel ball of radius 2 cm is initially at rest. It is struck head on by another stell ball of radius 4 cm travelling with a velocity of 81 cm//s . If the collision is elastic their respective final velocities are