A sphere ball of mass moving with initial velocity collides elastically with another ball of mass which is fixed at one end of shaped rigid massless frame as shown in Fig (a). The shaped frame contains another mass connected at the other end

The speed of the striking mass after collision is |
|||||||

a) |
backwards |
b) |
0 |
c) |
in same direction |
d) |
backwards |

A sphere ball of mass moving with initial velocity collides elastically with another ball of mass which is fixed at one end of shaped rigid massless frame as shown in Fig (a). The shaped frame contains another mass connected at the other end

The speed of the striking mass after collision is |
|||||||

a) |
backwards |
b) |
0 |
c) |
in same direction |
d) |
backwards |

1 Answer

127 votes

**(d)**

Applying conservation of momentum

(i)

(ii)

Applying conservation of angular momentum about ,

(iii)

Solving Eqs. (i), (ii) and (iii), we get

Angle rotated,

127 votes

127