If the K.E of a body becomes four time of the initial value, then new momentum will:
Correct answer: A. Become twice its initial value
- A. Become twice its initial value
- B. Become three time, its initial value
- C. Become four time, its initial value
- D. Remains constant
Explanation
K.Ef= 4 K.Ei=> pf² / 2m = 4 (pi² / 2m)=> pf² = 4 pi²=> pf² = 2 pi²The new momentum will be two times the initial momentum.
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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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