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JAMB Physics 2012 Question 15

Question 15

Elasticity

If a load of 1 kg stretches a cord by 1.2cm, what is the force constant of the cord? [g ≈ 10ms−2]

  1. A.866Nm−1
  2. B.833Nm−1
  3. C.769Nm−1
  4. D.667Nm−1.
Show the answer and explanation

Answer: B (833Nm−1)

Explanation

k = F/e = (1 × 10) ÷ 0.012 ≈ 833 N m−1.