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JAMB Physics 2004 Question 35

Question 35

Elasticity

If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?

  1. A.100N
  2. B.50N
  3. C.250N
  4. D.200N
Show the answer and explanation

Answer: C (250N)

Explanation

By Hooke's law force ∝ extension: 0.05 m is 5 times 0.01 m, so F = 5 × 50 = 250 N.