In the given figure four identical spheres of equal mass are suspended by wires of equal length , so that all spheres are almost touching to each other. If the sphere 1 is released from the horizontal position and all collisions are elastic, the velocity of sphere 4 just after collision is

a) |
b) |
c) |
d) |

In the given figure four identical spheres of equal mass are suspended by wires of equal length , so that all spheres are almost touching to each other. If the sphere 1 is released from the horizontal position and all collisions are elastic, the velocity of sphere 4 just after collision is

a) |
b) |
c) |
d) |

1 Answer

127 votes

When the sphere 1 is released from horizontal position, then from energy conservation, potential energy at height kinetic energy at bottom Or Or Since, all collisions are elastic, so velocity of sphere 1 is transferred to sphere 2, then from 2 to 3 and finally from 3 to 4. Hence, just after collision, the sphere 4 attains a velocity equal to |

127 votes

127