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JAMB Physics 1988 Question 10

Question 10

Equilibrium of Forces

The figures above show three different ways of hanging a heavy picture from a hook. The tension in the string would be

Diagram for this question
  1. A.greatest in X
  2. B.greatest in Y
  3. C.greatest in Z
  4. D.same in each one.
Show the answer and explanation

Answer: B (greatest in Y)

Explanation

Each string's vertical pulls must add up to the weight. The flatter the strings, the smaller their vertical share, so the tension must be larger. The strings in Y are the flattest.