# Projectile motion -- I could use some help studying example problems please

1. Mar 14, 2016

### wib

1. The problem statement, all variables and given/known data
I have a test coming up in projectile motion, and I understand very little of it. Like calculating hang time, horizontal range, max height etc.

2. Relevant equations
ΔY=vyiΔt+1/2ay(Δt)^2
There shouldn't be any math past Algebra I

3. The attempt at a solution

2. Mar 14, 2016

### Staff: Mentor

Welcome to the PF.

Post an example problem here using the Homework Help Template like you tried to fill out above, and we should be able to help you study. There are more Relevant Equations (like how is the velocity related to acceleration, etc.), and you will usually use F=ma in your solutions.

Post a sample question and do your best to solve it, and we will give you some hints on what you are not seeing...

3. Mar 14, 2016

### wib

1. The problem statement, all variables and given/known data
Tom the cat is chasing Jerry the mouse across a table surface 1.5m high . Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 5 m/s.
A. Where will Tom strike the floor?
B. What are his vertiacl and horizontal velocity components just berfore he hits the floor?
2. Relevant equations
ΔY=vyiΔt+1/2ay(Δt)^2
Δx=vxit
My class rounds gravity from 9.81 to 10

3. The attempt at a solution
-1.5=0+1/2(-10)t^2
t=0.55
so Δx=(5)(0.55)
=2.8m

Last edited by a moderator: Mar 15, 2016
4. Mar 14, 2016

### The Vinh

For the first question
+) y = 0 = h - (gt^2)/2 => t
+) x = Vo*t => x

5. Mar 15, 2016

thanks