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PHYSICS

JAMB 2005 - Question 31

Physics 2005 JAMB Past Questions - Question 31: An object is projected from a height of 80 m above the ground with a velocity of 40 ms- at an angle of 30 to the horizontal. The time of flight is

Choose the correct answers from the options given.

An object is projected from a height of 80 m above the ground with a velocity of 40 ms- at an angle of 30 to the horizontal. The time of flight is

A: 4 s.

B: 16 s.

C: 10 s.

D: 8 s.

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Correct Answer

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.