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Question 6048
NEET Physics · Hard

Work, Energy & Power: Spring PE MCQ

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Spring PEHardQuestion 6048

Question

Spring (k=1000 N/m, x=0.1 m) fires 10 g ball. Ball's speed:
  1. A
    5 m/s
  2. B
    √1000 m/s
    Correct
  3. C
    10 m/s
  4. D
    √500 m/s

Correct answer

√1000 m/s

Explanation

½kx² = ½mv². v² = kx²/m = 1000×0.01/0.01 = 1000. v = √1000 m/s ≈ 31.6 m/s.

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