A stone is dropped from the top of a cliff and hits the round below with a speed of 50m/s. Assume that the acceleration due to gravity is 10m/s/s. Find it's mean speed, in m/s, during the fall. Do not include units when typing your answer into the box.

Using the answer you calculated for the mean speed, now calculate at what time the stone will be moving at exactly the speed calculated. Put your answer in terms of seconds, but do not include units when typing this into the box. Round your answer to the nearest half second.

average = 50/2 = 25 m/s

v = a t = 10 t
25 = 10 t
t = 2.5