If the K.E of a particle is quadrupled, then its momentum will:
Correct answer: B. Be doubled
- A. Remain same
- B. Be doubled
- C. Be quadrupled
- D. Be half
Explanation
K = p²/(2m). If K → 4K, then p² → 4 p² ⇒ p → 2 p. Hence momentum doubles when kinetic energy is quadrupled.
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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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