Question on: WAEC Physics - 1993
An object is projected with a velocity of 100 ms-1 from the ground level at an angle 0 to the vertical. If the total time of flight of the projectile is 10 s, calculate θ. (g = 10 ms-2).
A
0o
B
30o
C
45o
D
60o
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Correct Option: B
T =
2u sinθ/g
sinθ =
Tg/2u =
10 x 10/2 x 100 = 0.5
,θ = sin-10.5 = 30o
,θ = sin-10.5 = 30o
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