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A cord wrapped on a pulley (disc) of ma...

A cord wrapped on a pulley (disc) of mass M and radius R as shown in the figure. To one end of the cord, a block of mass M is connected as shown and to other end in (A) a force of 2 Mg is applied and in (B) a block of mass 2M is connected. Let angular acceleration of the disc in A and B are `alpha_(A)` and `alpha_(B)`, respectively, then: [cord is not slipping on pulley]:

A

`alpha_(A) = alpha_(B)`

B

`alpha_(A) gt alpha_(B)`

C

`alpha_(A) lt alpha_(B)`

D

None of these

Text Solution

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The correct Answer is:
B
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