# Homework Help: Can't figure this out Urgent

1. Feb 2, 2010

### Judas543

Can't figure this out!! Urgent

1. The problem statement, all variables and given/known data
http://img222.imageshack.us/img222/2470/63809024.png [Broken]

2. Relevant equations

No Idea......

3. The attempt at a solution
If anyone can solve this then i will be very grateful!

Last edited by a moderator: May 4, 2017
2. Feb 2, 2010

### thebigstar25

Re: Can't figure this out!! Urgent

hint for part (a)

use the setup in the figure

http://img189.imageshack.us/img189/9246/ed96dcopyy.jpg [Broken]

hint for part(b)

you know that velocity = distance / time .. your time here is T (time for one complete cycle) so find the distance that the particle will cover during that time (i.e distance of one cycle) and substitute ..

hint for part (c)

hmmm .. i think your original questions is missing an r .. it should be in part (a) that you prove r = r cos(theta) i + r sin(theta) j ?? .. if there was such a mistake then this part should be straight forward ..

show your work , so if you got stuck at some point we can help ..

Last edited by a moderator: May 4, 2017