question_answer

A simple pendulum consisting of a ball of mass m tied to a thread of length l is made to swing on a circular arc of angle\[\theta \] in a vertical plane. At the end of this arc, another ball of mass m is placed at rest. The momentum transferred to this ball at rest by the swinging ball is                        [NCERT 1977]

A)            Zero                                         

B)            \[m\theta \sqrt{\frac{g}{l}}\]

C)            \[\frac{m\theta }{l}\sqrt{\frac{l}{g}}\]                          

D)            \[\frac{m}{l}2\pi \sqrt{\frac{l}{g}}\]