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JAMB Physics 2014 Question 10

Question 10

Equilibrium of Forces

One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is

  1. A.zero.
  2. B.negative.
  3. C.positive.
  4. D.average.
Show the answer and explanation

Answer: A (zero.)

Explanation

For equilibrium the resultant force must be zero (forces up = forces down), and the total moment about any point must also be zero.