Question

A particle of mass 'm' and velocity $\overrightarrow{v}$ collides oblique elastically with a stationary particle of mass 'm'. The angle between the velocity vectors of the two particles after the collision is:

• A. ${40}^{\circ }$
• B. ${30}^{\circ }$
• C. ${90}^{\circ }$
• D. None of these

Answer 1

Answer: (C)

${90}^{\circ }$

In any oblique collision bodies will collide at tangent point and move perpendicular to each other.

EXAMPLE: As we strike the carom balls with striker it collide with the ball and both will move perpendicularly to each other. Hence the angle between them is ${90}^o$.