Question

An apple falls out of a tree from a height of 2.3 m. What is the impact speed of the apple?

A. 45.1 m/s
B. 6.71 m/s
C. 3.12 m/s
D. 9.11 m/s

Answer 1

First you have to know how long the fall took

d=1/2 gt^2 or
t^2=2 d/g=2*3.4/9.8

Answer 2

you can use v^2 = u^2 + 2 a x, one of the 3 commonly quoted equations of motion, to solve direct.

v = final velocity
u = initial velocity = 0
a = gravity
x = distance