Hey PhysicsForums. Long time reader looking for some assistance(adsbygoogle = window.adsbygoogle || []).push({});

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

[PLAIN]http://img205.imageshack.us/img205/3923/physicsg.jpg [Broken]

2. The attempt at a solution

I'm pretty sure the idea is to find the unit position vector to point A, and the force vector F.

I found the unit position vector to be u = (-4/6)i +(4/6)j + (2/6)k, and the force to be F = (560cos60sin30)i + (560cos60cos30)j + (560sin60)k

Dotting them together gives me 230 lb, but Mastering Engineering doesn't agree with me. Can anyone point out where I went awry?

Thanks for reading!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Force projection onto body's axis

**Physics Forums | Science Articles, Homework Help, Discussion**