# Homework Help: Matlab Simulink: Simulate the height of ball thrown upward

Tags:
1. Apr 14, 2015

### nightingale

1. The problem statement, all variables and given/known data

Upthrow simulation Conditions: initial velocity v=10m/s, initial height h=0m when t=0. Gravity acceleration g=10m/s2 .

Using Simulink to simulate the variation of height with time when t≥0.

2. Relevant equations

I figured that the governing equation should be:
Height = initial velocity (u) * time + 1/2 * acceleration * t^2

3. The attempt at a solution

Height = initial velocity (u) * time + 1/2 * acceleration * t^2
Height = 10 t * 1/2 * -10 * t^2
Height = 10 t - 5 t^2

I don't have a clue on how to simulate the height of the ball since it is a second order differentiation. Since the height varies with time, then isn't it dh/dt?

So, is it:

dh/dt = 10 - 5t ?

(I pulled the t out, and made it into differentiation)

Now again, I have been taught simulink by my lecturer for a mere one hour, and I honestly am clueless on how to simulate that (if the governing equation is right).

Any help will be much appreciated, thank you.

2. Apr 14, 2015

### RUber

In the Simulink tutorial files, there is one called Simulation of a Bouncing Ball. All the proper blocks are in place--you just have to change your initial conditions to match your problem.