Posted by admin | Posted in home improvement roofing | Posted on 31-08-2009
Tags: average cost of roofing per square foot, cost of metal roofing per square foot, how much is roofing per square foot, roofing per square foot cost
A stone is thrown straight down from the edge of a roof, 800 feet above the ground, at a speed of 11 feet per?
second.
A. Remember that the acceleration due to gravity is -32 feet per second squared, how high is the stone 4 seconds later?
B. At what time does it hit the ground?
use suvat eqn
for A
x=?
u=11
v=?
a=-32
t=4
x=ut+(at^2)/2
plug in values
x= 212 ft
so height is 800-212=588
Green Roof Installation – Caddy Wampus – edit
