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Q.

I. Speed of any point on rigid body executing rolling motion can be calculated by the expression ν=rωwhere r is the distance of point from instantaneous centre of rotation.II. Rolling motion of rigid body can be considered as a pure rotation about instantaneous centre of rotation.Which of the above statement{s} is/are correct?

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a

Only I

b

Only II

c

Both I and II

d

Neither I nor II

answer is A.

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Detailed Solution

Statement I is correct while Statement II is incorrect.The corrected statement is;Every rolling motion cannot be considered as pure rotation.For pure rotation, the condition is linear velocity, ν=rω

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I. Speed of any point on rigid body executing rolling motion can be calculated by the expression ν=rωwhere r is the distance of point from instantaneous centre of rotation.II. Rolling motion of rigid body can be considered as a pure rotation about instantaneous centre of rotation.Which of the above statement{s} is/are correct?