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WAEC Further Mathematics 2019 Question 25

Question 25

Dynamics

A 35 N force acts on a body of mass 5 kg for 2 seconds. Calculate the change in momentum of the body.

  1. A.70 kg ms−1
  2. B.55 kg ms−1
  3. C.50 kg ms−1
  4. D.35 kg ms−1
Show the answer and explanation

Answer: A (70 kg ms−1)

Explanation

Change in momentum = impulse = Ft = 35 × 2 = 70 kg ms⁻¹.