Q.
A sphere can roll on a surface inclined at an angle θ if the friction coefficient is more than g7 tanθ . If a sphere is released from rest on the incline
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a
it will stay at rest
b
it will make pure translational motion
c
it will translate and rotate about the centre
d
the angular momentum of the sphere about its centre will remain constant
answer is C.
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Detailed Solution
As the condition for minimum coefficient of friction is satisfied the sphere rolls down hence it has both translatory and rotatory motions
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