A body of mass, m, resting on a smooth inclined plane at an angleΘto the horizontal is connected to a mass M over a smooth pulley (Figure 4). Find the velocity, v of the object of mass m when it has moved a distance b up the plane.
A
v=√2gb(M−msinΘ)M+m
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B
v=√gb(M+msinΘ)M+m
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C
v=√2gb(M−msinΘ)M−m
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D
v=√gb(M−msinΘ)M−m
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Solution
The correct option is Av=√2gb(M−msinΘ)M+m Decrease in PE of system =MgbmgbsinΘ Increase in KE of system =12(M+m)v2