A mass M is hung from a spring. It is then pulled down slightly and allowed to vibrate vertically between P and Q.
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
At the extreme points, P and Q, the spring is not moving. So there is no kinetic energy at both points. At P, there is maximum elastic potential energy of the spring. At Q, there is gravitational potential energy.
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Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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