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Per NCERT §5.9 example (5.8), a 1000 kg car at 18.0 km/h (= 5 m/s) hits a spring with k = 5.25×10³ N/m. Maximum compression is approximately which?
A0.5 m
B0.1 m
C2.18 m
D5 m
Answer & Solution
Correct answer: C. 2.18 m
NCERT Ex 5.8: (1/2) m v² = (1/2) k x² ⇒ x = v √(m/k) = 5 √(1000/5250) ≈ 2.18 m.
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