- #1

Januz Johansen

- 34

- 1

## Homework Statement

Hello all, I have to determine the maximum height of a model rocket.

The rocket is launched at an 45 degree angle

The finale velocity is 15,69 m/s (v)

the extutevelocety is 14,23 m/s (c)

The total mass is 180 gram (m) or m0)

The emty mass is 52 grams (mf)

The mass pr sek is 0,45 kg/s (me)

And the total burntime is 0,28 sek (t)

## Homework Equations

How can i calculate the hight at burnout, (i know how to calculate the last part) or all in one?

## The Attempt at a Solution

I have tryed intregrating the rocket equation (v(t)) to get s(t), so i can calulate it with phytagoras, i got the equation from v(t) to:

but i have looked around to see it it was right, and i found this equation:

they give me different results, who is right, or are we both wrong?

Hope you can help