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A body of mass 4.9 kg hangs from a spring and oscillates with a period of 0.6 sec. How much will the spring shorten when the body is remove…

3689Medium DSSSB TGT Computer Science 0 replies 2 views
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A body of mass 4.9 kg hangs from a spring and oscillates with a period of 0.6 sec. How much will the spring shorten when the body is removed?

  • A0.809 metre
  • B1.089 metre
  • C1.009 metre
  • D0.089 metre
Correct answer: D

Explanation

k = 4π²m/T² = 4π² × 4.9/0.36 ≈ 537.3 N/m. Extension = mg/k = 4.9 × 9.8/537.3 ≈ 0.089 m.
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