OpenStudy (anonymous):

Its a physics question. Noone is answering in physics group so i am asking here. related to speed, velocity and accelertaion : A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the velocity of the ball, the instant before it hits the ground.

2 years ago
OpenStudy (irishboy123):

use $$v = u + at$$ a = gravity

2 years ago
OpenStudy (irishboy123):

or just note that gravity = $$\frac{\Delta v}{\Delta t}$$ = constant, so $$\Delta v = g.\Delta t$$

2 years ago