Posted by Josh on Tuesday, October 23, 2012 at 1:38pm.
For the first part of this question I got 12.12m/s
B. With the help of a friend the boy measures the height to which the ball returns and finds it to be 5.2 meters. How fast was the ball moving when it left the ground?
I wrote this down
mass of ball: 0.40kg
height if house: 7.5
gravity: 9.8m/s^2
v1: 12.12m/s
Help please

Physics  Elena, Tuesday, October 23, 2012 at 2:00pm
v=sqrt(2gh)