WAEC Physics 2018 Theory — Question 7

Question 7 of 27 from the West African Examinations Council (WAEC) Physics 2018 Theory paper, with the correct answer and a full explanation.

5. A missile is projected so as to attain its maximum range. Calculate the maximum height attained if the initial velocity of projectile is 200ms⁻¹. [g = 10ms⁻²]

Model answer

Maximum range occurs at θ=45°. Maximum height H = u²sin²θ/2g = (200²×sin²45°)/(2×10) = (40000×0.5)/20 = 1000m.

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