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Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

15. A pulley fixed to the ceilling carries a string with blocks of mass m and 3 m attached to its ends. The masses of string and pulley are negligible. When the system is released, its centre of mass moves with what acceleration

(a) 0 (b) g/4

(c) g/2 (d) -g/2

Ans. b

5/5 - (4 votes)

PrevPrevious3. Assertion : Work done by friction on a body sliding down an inclined plane is positive. Reason : Work done is greater than zero, if angle between force and displacement is acute or both are in same direction.

NextAssertion : When a gas is allowed to expand, work done by gas is positive. Reason : Force due to gaseous pressure and displacement (of piston) are in the same direction.Next

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