JAMB Physics 2015 Objective — Question 28
Question 28 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2015 Objective paper, with the correct answer and a full explanation.
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A projectile is fired from the ground level with a velocity of 300ms⁻¹ at an angle of 30° to the horizontal. Calculate the time taken to reach the maximum height. [g=10ms⁻²]
- A. 25s
- B. 30s
- C. 20s
- D. 15sCorrect
Explanation
t = Usinθ/g = 300×sin30°/10 = 15s.
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