Math, Please Help!!!
posted by Desperate!!!! .
1. The problem statement, all variables and given/known data
a ball is thrown straight down from the top of a 220 feet building with an initital velocity of 22ft/s. What is the velocity of the ball after 3 seconds? What is the velocity of the ball after falling 108 feet?
2. Relevant equations
s(t) = 16t^2 + Vi(t) + si vi = initial velocity, si = initial position
3. The attempt at a solution
s(t) = 16t^2 +Vi(t) +si
= 16t^2  22ft/s + 200ft
V(t) = 32(t)  22ft/s
V(3) = 96 ft/s  22ft/s = 118 ft/s
I can seem to figure out how to determine the velocity of the ball after it has dropped 108ft.
I should be able to do this, but i'm missing something, somewhere on what should be pretty basic.
Thanks for any guidance!

done under your previous post as Audrey
http://www.jiskha.com/display.cgi?id=1328273218
Respond to this Question
Similar Questions

Math: Word Problem
A ball is thrown upward from the top of a building which is 96ft tall w/ Initial velocity of 80 ft per sec. Distance s(ft) of ball from the ground after t sec is s=96+80t16t^(2) 1) how many sec. will the ball pass the top of the building … 
Calculus
When a ball is thrown straight down from the top of a tall building, with initial velocity 30 ft/sec, the distance from the release point at time t in seconds is given by s(t)=16t^2+30t. If the release point is 300 ft above ground, … 
12th Grade Calculus
When a ball is thrown straight down from the top of a tall building, with initial velocity 30 ft/sec, the distance from the release point at time t in seconds is given by s(t)=16t^2+30t. If the release point is 300 ft above ground, … 
Calculus
A ball is thrown straight down from the top of a 220foot building with an initial velocity of 22 feet per second. What is its velocity after 3 seconds? 
math
A person standing on the roof of a building throws a ball directly upward. The ball misses the rooftop on its way down and eventually strikes the ground. The function s(t) = −16t2 + 64t + 80 describes the ballâ€™s height above … 
Calculus
1. The problem statement, all variables and given/known data a ball is thrown straight down from the top of a 220 feet building with an initital velocity of 22ft/s. What is the velocity of the ball after 3 seconds? 
Physical Science
Four balls are taken to the top of a building. Ball 1 is dropped (zero initial velocity). Ball 2 is thrown straight up with a velocity of 3 m/s. Ball 3 is thrown straight out with a horizontal velocity of 3 m/s. Ball 4 is thrown straight … 
Physics
Ball A is thrown straight down off the top of a tall building with an initial velocity of 20m/s. Ball b is thrown straight up from the top of the same building with initial velocity of 20 m/s. Which ball, if either, experiences the … 
Math
A ball is thrown downward from the top of a 100foot building with an initial velocity of 14 feet per second. The height of the ball h after t seconds is given by the equation h=16t^214t+100. How long after the ball is thrown will … 
Math
A ball is thrown straight up from the top of a building 148 ft. tall with an initial velocity of 72 ft per second. The distance s(t) (in feet) of the ball from the ground is given by s(t) = 148 + 72t − 16t2. Find the maximum …