A ball is thrown horizontally at 15 m/s from a clifftop 60 m above the sea level. Find:

Question

a) the time to land;
b) the angle at which it hits the water;
° below the horizontal
c) the speed at which it hits the water.

Answer 1

a. time to fall, in the vertical
-60=-4.9t^2 solve for t.
b,c
theta=arctan vf/17
where 1/2 mvf^2=mg60
vf=sqrt120g