Assertion : 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

If the force and the displacement are in the same direction, then the work done is:

Assertion: In the process pT=constant, if temperature of gas is increased work done by the gas is positive. Reason: For the given process, VpropT .

Assertion: In the process pT=constant, if temperature of gas is increased work done by the gas is positive. Reason: For the given process, VpropT .

Assertion : When the force retards the motion of a body, the work done is zero. Reason : Work done depends on angle between force and displacement.

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.