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After perfectly inelastic collision betw...

After perfectly inelastic collision between two identical balls moving with same speed in different directions, the speed of the combined mass becomes half the initial speed. Find the angle between the two before collision.

Text Solution

Verified by Experts

The correct Answer is:
`120^(@)`
`2m u cos. (theta)/(2) = 2mv`
`rArr v = u cos. (theta)/(2) = (u)/(2)`
`rArr "cos" (theta)/(2) = (1)/(2), (theta)/(2) = 60^(@), theta = 120^(@)`
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