In the previous collision, the fraction of initial kinetic energy lost is approximately:
A99%
B50%
C1%
D100%
Answer & Solution
Correct answer: A. 99%
K_i = ½·0.01·200² = 200 J; K_f = ½·1·2² = 2 J; loss ≈ 198/200 ≈ 99%.
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