FREE FALL

Freely falling objects are affected only by gravity (assuming no air resistance.)

Acceleration of gravityg = 9.8 m/s2

Instantaneous speed =

acceleration x elapsed time v = g x t

For an object

falling from rest

For objects thrown upward, speed decreases at the same rate as it increases when moving downward, 9.8 m/s2.

At the point where it changes direction from upward to downward, its instantaneous speed is zero.

Distance, d, an object moves at the end of time, t

d = ½ gt2