(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A solar sailplane is going from Earth to Mars. Its sail is oriented to give a solar radiation of 8.00x10^2 N. The gravitational force due to the Sun is 173 N. And the gravitational force due to Earth is 1.00x10^2 N. All forces are in the lane formed by Earth, Sun, and sailplane. The mass of the sailplane is 14,500 kg. What is the net force (magnitude and direction) acting on the sailplane?

<img src="http://farm4.static.flickr.com/3070/2630742185_01c6dba522.jpg?v=0">

(I guess I can't use HTML here... the illustration can be found at the link above)

2. Relevant equations

Pythagorean theorem

3. The attempt at a solution

I posted this problem once before. Solved it beautifully with the help provided at this forum. Except, when my teacher assigned this problem he forgot to give us the illustration to go along with it and told the class to do it over.

I tried various trig functions and tried adding them together. I don't think I'm doing it correctly, however. This is what I have:

x = 800cos(30) = 692.82

y = 800sin(30) = 400

x+y= 1092.82

x = 173cos(90) = 0

y = 173sin(90) = 173

x+y = 173

x = 100cos(90) = 0

y = 100sin(90) = 90

x+y = 90

Sum of all forces = 1092.82 + (-173) + (-90) = 829.82 N

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# Adding vectors of sailplane

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