Question

A ball falls from the top of a building. When it strikes the ground its velocity is 10 m/s. It took 5 seconds to fall. What is its acceleration? _____ m/s2

Answer 1

a = 2 m/s²

Explanation:

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

where v is the final velocity, u is the initial velocity, and t is the time it takes. the intial velocity is always 0 m/s. given the equation, we subsitute:

`a = (10m/s - 0 m/s)/(5s)`

a = 10m/s ÷ 5s

a = 2 m/s²