# [SOLVED] average velocity

• Jan 18th 2010, 03:59 PM
crystal91
[SOLVED] average velocity
thanx
• Jan 18th 2010, 04:01 PM
mr fantastic
Quote:

Originally Posted by crystal91
Hi, can someone check the below answer?

The height in meters of a ball dropped from the top of CN tower is given by h(t)= -4.9t^2+450
find the average velocity for the first two seconds?

h(0)=-4.9(0)^2+450
h(0)=450
h(2)= 430.4
AROC= 430.4-450/2-0
AROC= -9.8m/s

By definition, the answer is given by $\frac{h(2) - h(0)}{2 - 0}$ so assuming that your arithmetic is correct your answer will also be correct.