Physics
A spring is kept compressed by a small trolley of mass 0.5 kg lying on a smooth horizontal surface as shown. When the trolley is released, it is found to move at a speed of v = 2 ms-1. What potential energy did the spring possess when compressed?
Work, Energy & Power
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Answer
Given,
Mass = 0.5 kg
Velocity = 2 m / s
Potential Energy possessed by the spring is equal to the kinetic energy of moving trolley.
Kinetic energy of trolley
∴ Potential energy = Kinetic energy = 1.0 J
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