The negative of the work done by the conservative internal force on a system always equals the change in:
Correct answer: C. potential energy
- A. Total energy
- B. kinetic energy
- C. potential energy
- D. none of these
Explanation
Option C is correct as: The relation between conservative force and potential energy is Fcos = -dU/dx Fcos (dx) = -dU -W = -Fcos (dx) = ∆U
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About Work and Energy
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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