- #1

juju1

## Homework Statement

[/B]

In gravity-free interstellar space, a spaceship fires its engines to speed up. The total thrust of the engines as a function of position is shown in the graph below.

*F*on the graph represents 79 kN of thrust. The rocket's mass is 11500 kg.

*Note the units on the graph - kN and km!*The rocket's initial velocity is 1650 m/s.

What is the area of one grid square on the graph?

What is the area under the curve?

## Homework Equations

## The Attempt at a Solution

[/B]

i tried taking 79kN and converting into N, and got 79000. Then I divided by 2 because, if you see in the image that i linked, F=79kN and F takes up 2 grid squares...i got 39500 but that was wrong!

I don't think I can solve how to find area under graph if I can't find what one grid square equals. Also there are 26.5 grid squares in total.