Asked Mar 2, 2020

A billiard ball with an initial speed of 10 m/s collides elastically with two identical billiard balls whose centers are on a line perpendicular to the initial velocity and that are initially in contact with each other as shown in the figure above. The first ball is aimed directly at the point of contact between the other two balls. All the balls are frictionless. Find the velocities of all three balls after the collision.

Hint: consider the direction of the impulsive force of the moving ball on each of the two stationary balls at the instant of the collision.


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