WAEC Further Mathematics 2025 Objective — Question 28
Question 28 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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A particle of mass 4 kg moves from point P with velocity (3i+10j) ms⁻¹ and reached point Q with velocity (2i+3j) ms⁻¹. Find the change in momentum of the particle from P to Q.
- A. -4i+28j
- B. -4i-28jCorrect
- C. 4i-28j
- D. 4i+28j
Explanation
Change in momentum = m(v2-v1) = 4[(2i+3j)-(3i+10j)] = 4(-i-7j) = -4i-28j.
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