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Q.

A cube of mass ‘m’ and side ‘a’ moving along with a constant speed v0 as shown in figure. The magnitude of angular momentum of cube about z-axis would be

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a

mv0(b-a)2

b

3mv0b-a2

c

mv0b2

d

mv0b-a2

answer is D.

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Detailed Solution

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From the figure,

r1=(b-a)sin30o=b-a2

Now the angular momentum,

∴L=mvor2

L=mvo(b-a)2

Hence the correct answer is mvo(b-a)2.

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