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Q.

A particle of mass m is moving with constant velocity v along X-axis in X-Y plane as shown in figure. Its angular momentum with respect to origin at any timet, if position vector is r is

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a

3mvrk

b

3/2⋅mvrk

c

-1/2.mvrk^

d

mvrk

answer is B.

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Detailed Solution

We know that L→ = r→ ×p→ =r cos 600 i^+r sin 600j^×mv i^ = -12mvr k^
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