WAEC Further Mathematics 2024 Objective — Question 18

Question 18 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2024 Objective paper, with the correct answer and a full explanation.

18. A body of mass 42 kg increases its speed from 15 ms^-1 to 43 ms^-1 in 12 seconds. Find the force acting on the body.

A. 203 N
B. 150 N
C. 98 NCorrect
D. 52 N

Explanation

Acceleration = (change in velocity)/(time taken) = (43-15)/12 = 28/12 = 7/3 ms^-2. Force = mass x acceleration = 42 x 7/3 = 98N.

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