Question

A bullet is fired from the top of a cliff with a velocity of 150m/s at Anna angle of elevation 30°to the horizontal .find the horizontal distance from the foot of cliff to the point where the bullet lands on the ground

Answer 1

Need the height of the cliff.

vertical problem
Vi = 150 sin 30 = 75
v = 75 - 9.81 t
h = cliff height + 75 t - 4.9 t^2
find t when h = 0
then Horizontal problem, constant speed u = 150 cos 30
distance horizontal = u t