Question

A ball is thrown with a velocity of 30 m/s from the top of a building 200 metre high. The ball makes an angle of 30° with the horizontal. Calculate the distance from the foot of the building where the ball strikes the ground.
(Take g=10 m/s^2)
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Answer 1

Answer:

120√3 m

Explanation:

x = 30tcos30 , t = 2x/30√3 = x/15√3 = x√3/45

y = 200+30tsin30 - 5t² = 200 + 15t -5t² = 0

(t-8)(t+5) = 0

t = 8s

x = 240√3/2 = 120√3 m.