Question

A cannon ball is fired horizontally with velocity of 15m from the top of a cliff 90m high.after how many seconds will it hit the foot of the cliff(a)time (b)at what distance from the foot of the cliff will it strike.

Answer 1

Xo = 15 m/s.
h = 90 m.
g = 9.8 m/s^2

a. h = 0.5g*t^2 = 90 m. Solve for t.

b. Dx = Xo * t