Assertion : A solid sphere is rolling on a rough horizontal surface. Acceleration of contact point is zero.Reason : A solid sphere can roll on the smooth surface.
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a
If both assertion and reason are true and reason is a true explanation of assertion.
b
If both assertion and reason are true but reason is not the correct explanation of assertion
c
If assertion is true but reason is false.
d
If both assertion and reason are false.
answer is D.
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Detailed Solution
During rolling motion, there is radial acceleration towards the centre.A solid sphere cannot roll on smooth surface hence reason is false.