A ball is dropped from a height of 10 m, then:
Correct answer: C. The potential energy decreases and the kinetic energy increases during the fall
- A. Its potential energy increases and kinetic energy decreases during the falls
- B. Its potential energy is equal to the kinetic energy during the fall.
- C. The potential energy decreases and the kinetic energy increases during the fall
- D. The potential energy and kinetic energy is maximum while it is falling
Explanation
As the ball falls, its height decreases therefore potential energy P.E decreases, which converts into kinetic energy K.E by law of conservation of energy. Therefore P.E decreases and K.E increases.
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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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