question_answer

A billiards player hits a stationary ball by an identical ball to pocket the target ball in a comer pocket that is at an angle of \[35{}^\circ \] with respect to the direction of motion of the first ball. Assuming the collision as elastic and that frictional and rotational motions are not important, the angle made by the target ball with respect to the incoming ball is

A) \[35{}^\circ \]         

B) \[50{}^\circ \]

C) \[55{}^\circ \]

D) \[60{}^\circ \]

Correct Answer: C

Solution :

 The angle made by the target ball with respect to the incoming ball                                   \[=90-{{35}^{o}}\]                  \[={{55}^{o}}\]