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JAMB Physics 1987 Question 5

Question 5

Equilibrium of Forces

Figure 1 above shows two connected bodies of masses m1 and m2 in equilibrium under gravity. The tension in the upper string is

Diagram for this question
  1. A.(m1 − m2)g
  2. B.m1g
  3. C.m2g
  4. D.(m1 + m2)g.
Show the answer and explanation

Answer: D ((m1 + m2)g.)

Explanation

The upper string holds up both bodies, so its tension equals their total weight (m1 + m2)g.