WAEC Physics 2015 Theory — Question 2

Question 2 of 26 from the West African Examinations Council (WAEC) Physics 2015 Theory paper, with the correct answer and a full explanation.

2. A body is projected at an angle of 30° to the horizontal with a velocity of 150 ms⁻¹. Calculate the time it takes to reach the greatest height. [g = 10 ms⁻²]

Model answer

Time to reach maximum height, t = (u sinθ)/g = (150 × sin30°)/10 = (150 × 0.5)/10 = 7.5 s.

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