A ball is dropped from a height as shown.Ignoring the effects of air resistance, the total energy is:
Correct answer: D. The same at all points
- A. Greatest at point 1
- B. Greatest at point 2
- C. Greatest at point 3
- D. The same at all points
Explanation
Using principle of conservation of energy. the loss in gravitational potential energy = gain in kinetic energy at all times. Hence, total energy = GPE + KE = constant at all times.
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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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