A billiard ball moving at a speed of 6.6 m s - 1 strikes an identical stationary ball elastically. After the collision, one ball is found to be moving at a speed of 3.3 m s - 1 in a direction making an angle of 60 ° with the original line of motion. The velocity of the other ball is

Question

A billiard ball moving at a speed of 6.6 m s - 1 strikes an identical stationary ball elastically. After the collision, one ball is found to be moving at a speed of 3.3 m s - 1 in a direction making an angle of 60 ° with the original line of motion. The velocity of the other ball is, 4.4 m s - 1, 6.6 m s - 1, 3.3 m s - 1, 5.7 m s - 1

MARKS App · Accepted Answer

Applying conservation of momentum m 6 .6 i ^ + 0 = m 3 .3 cos ⁡ 60 o i ^ + 3 .3 sin ⁡ 60 o j ^ + m v → v → = 4 .95 i ^ - 2 .85 j ^ v = 5 .7 ms - 1

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