A small stone is dropped (released from rest) from the edge of a flat school roof that is 5.0m above the ground. Take the magnitude of acceleration due to gravity as g=10m/s2 for easy estimation.
a. Part 1: (a) Estimate the time taken by the stone to reach the ground.
b. Part 2: (b) Find the speed of the stone just before it strikes the ground.
c. Part 3: (c) A student claims he can say the words “one–thousand” just once before the stone lands. Use your results to comment on whether this claim is reasonable.