WAEC Physics 2014 Objective — Question 6

Question 6 of 50 from the West African Examinations Council (WAEC) Physics 2014 Objective paper, with the correct answer and a full explanation.

When the linear momentum of a body is constant, the net force acting on it

A. is zeroCorrect
B. increases
C. decreases
D. remains constant (non-zero)

Explanation

Since force = rate of change of momentum, if momentum is constant, the net force acting on the body is zero (principle of conservation of linear momentum).

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