Question

1. An object is dropped vertically downwards from the top of a building.

(i) Determine the height of the building if it hits the ground in 2.5 seconds.
(ii) Determine the velocity with which it will hit the ground.

Answer 1

Step-by-step explanation:

i)h=ut+1/2at^2

h=0(2.5s)+1/2(10m/s^2)(2.5s)^2

h=26.25m

ii)v=gt

v=10m/s^2×2.5s=25