STANDARDPhysics-Work, Energy and Power
STANDARD Physics Kinetic Energy MCQ Question
Type: MCQ-numerical-Medium-Class 11
The momentum of a body is increased by 25%. The kinetic energy is increased by about
A
25%
B
5%
C
56%
D
38%
Correct Answer
Option C
Detailed Explanation
Kinetic energy of the body is K = p²/2m. When the momentum of a body is increased by 25%, its momentum becomes p' = 1.25p. Therefore, K' = (p')²/2m = (1.25p)²/2m = 1.5625K. The percentage increase in kinetic energy is (K' - K)/K × 100 = 56%.
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