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Q.

A uniform circular ring rolls without slipping on a horizontal surface. At any instant, its position is as shown in the figure. Then

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a

the sections CD and DA have the same kinetic energy

b

section BC has greater kinetic energy than section CD

c

section ABC has greater kinetic energy than section ADC

d

the section BC has the same kinetic energy as section DA 

answer is A, B, D.

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Detailed Solution

O ➔ Instantaneous axis of rotation

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v=rω or vr

More the value of r from O more is the speed of point P.

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A uniform circular ring rolls without slipping on a horizontal surface. At any instant, its position is as shown in the figure. Then