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An object is projected from a height of 80 m above the ground with a velocity...

Physics
JAMB 2005

An object is projected from a height of 80 m above the ground with a velocity of 40ms-1 at an angle of 30° to the horizontal. The time of flight [ g ≈ 10m/s\(^2\)

  • A. 8 s
  • B. 4 s
  • C. 16 s
  • D. 10 s
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Correct Answer: Option B
Explanation

for a body projected at an angle θ to the horizontal, the time of the flight is given by T = (2u sin θ)/g =(2x 40)x sin (30)/10 =(2 x 40) x (0.5)/10 = 4.0secs.

There is an explanation video available below.


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Explanation Video

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