Question

Use the formula below to solve the given problem. In the formula, d

represents the distance an object falls, in feet, and I represents the time that
an object falls, in seconds. Do not include units in your answer.
A penny is dropped from the top of a building and takes 5 seconds to fall to
the ground. What is the height of the building?
Answer here​

Answer 1

`a = (v - u)/(t)`

^^acceleration formula

`s = (1)/(2) (u + v) \: t`

^^displacement formula

since the acceleration due to gravity is 9.8m/s^2 or 10m/s^2

9.8 = v-0/5

v = 49m/s

s= 1/2 (49m/s +0 m/s) 5

s= 122.5m