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JAMB Physics 2014 Question 11

Question 11

Equilibrium of Forces

What happens when three coplanar non-parallel forces are in equilibrium?

  1. A.They are represented in magnitude only.
  2. B.They are represented in direction only.
  3. C.Their lines of action meet at a point.
  4. D.Their lines of action are parallel.
Show the answer and explanation

Answer: C (Their lines of action meet at a point.)

Explanation

Three non-parallel forces in equilibrium must be concurrent: their lines of action pass through one point (otherwise they would make the body turn).