Q.

A particle of mass m is moving along the side of a square of side 'a' with a uniform speed v in the x - y plane as shown in the figure. Which of the following statement is false for the angular momentum L about the origin?

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a

L=mv2Rk^ When the particle is moving from D to A

b

L=mv2Rk^ When the particle is moving from A to B

c

L=mvR2+ak^ When the particle is from C to D

d

L=mvR2+ak^ When the particle is moving from B to C

answer is B.

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Detailed Solution

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L=mr×v

Correct statement should be

L=-mv2Rk^ When the particle is moving from D to A

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A particle of mass m is moving along the side of a square of side 'a' with a uniform speed v in the x - y plane as shown in the figure. Which of the following statement is false for the angular momentum L→ about the origin?