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JAMB Physics 1994 Question 14

Question 14

Elasticity

A spring of length 25cm is extended to 30cm by a load of 150 N attached to one of its ends. What is the energy stored in the spring?

  1. A.3750 J
  2. B.2500 J
  3. C.3.75 J
  4. D.2.50 J
Show the answer and explanation

Answer: C (3.75 J)

Explanation

Energy = ½ × force × extension = ½ × 150 × 0.05 = 3.75 J.