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Per NCERT §5.11.2 Case II, in an elastic 1D collision where a LIGHT mass hits a much HEAVIER stationary mass (m₂ ≫ m₁), what happens?
ALight mass passes through unchanged
BLight mass reverses; heavy mass stays at rest
CBoth move forward together
DHeavy mass speeds up while light continues forward
Answer & Solution
Correct answer: B. Light mass reverses; heavy mass stays at rest
NCERT §5.11.2 Case II: v_{1f} ≈ -v_{1i} (bounces back); v_{2f} ≈ 0 (heavy mass barely moves).
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