# Thread: writing a vector given magnitude and direction

1. ## writing a vector given magnitude and direction

A force of magnitude 15 pds. pulling on a suitcase makes an angle of 30 degrees with the ground. Express the force in terms of its i and j components.

I just want to be sure that my answer is correct, if not can you someone let me know.

TY

Math2.rtf

2. Not with an rtf file. If you want to upload an image so be it.

Usually you get $15\cos(30) \mathbf{i} + 15\sin(30) \mathbf{j}$

$30^{\circ}$ is on the unit circle so sub in the actual value for your final answer

3. Im guessing were not supposed to use rtf file. Here is my solution:

= 15 cos pie/6 i + 15 sin pie/6 j
=
15 sqrt 3 / 2 i + 15/2 j

4. That's the same answer I get.

There is no rule stating that you're not supposed to use rtf file, or any kind of file for that matter. It's discouraged because many people won't open files due to a potential security risk