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Assume that all the pulleys are massless...

Assume that all the pulleys are massless and frictionless and strings to be inextensible.

A

Acceleration of P is 4 F/m

B

Acceleration of m is F/m

C

Acceleration of P is 2F/m

D

Acceleration of m is F/2m

Text Solution

Verified by Experts

The correct Answer is:
B

`W _(1)=int[mu_(1)dmg(S_(2)-x)+mu_(2)dmg(S_(1)+x)]`
`=mu_(1)S_(2)gintdm + mu_(2)S_(1)g int dm + (mu_(2)-mu_(1))g int dmx`
`=(mu_(1)S_(2)+mu_(2)S_(1))Mg`
as `intxdm = 0 =M_("total")X_(cm) = 0`
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