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A particle of mass M is moving in a ...

A particle of mass M is moving in a horizontal circle of radius R with uniform speed v. When the particle moves from one point to a diametrically opposite point , its

A

momentum does not change

B

momentum changes by 2Mv

C

kinetic energy changes by `Mv^2/4`

D

kinetic energy changes by `Mv^2`

Text Solution

Verified by Experts

The correct Answer is:
B
Answer(2) On the diametrically opposite points, velocities have same magnitude but different directions.
`therefore` Change in momentum = `Mv - (-Mv) = 2Mv`
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