rock is thrown downward from the top of a cliff with an initial speed of 12 m/s, disregarding air resistance if the rock hits the ground after 2.0 s, what is the height of the cliff

Answer 1

initial speed, s= 12m/s
t= 2s
Use equation: h=s x t + 0.5 x g x t^2
h=12 x 2 + 0.5 x 9.5(g) x 2^2
h= 43.6 meters

Answer 2

44