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A uniform cylinder of mass M and radius ...

A uniform cylinder of mass `M` and radius `R` rolls without slipping down a slope of angle 8 with horizontal. The cylinder is connected to a spring of force constant `k` at the centre, the other side of which is connected to a fixed support at A. The cylinder is released when the spring is unstretched. The· force of friction `(f)`:

A

always upwards

B

always downwards

C

initially upwards and then becomes downwards

D

initially upwards and then becomes zero

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The correct Answer is:
C
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