Urgent Help Needed: Can't Figure Out Homework Problem

[Judas543]

Can't figure this out! Urgent

Homework Statement

http://img222.imageshack.us/img222/2470/63809024.png

Homework Equations

No Idea...

The Attempt at a Solution

If anyone can solve this then i will be very grateful!

 

[thebigstar25]

hint for part (a)

use the setup in the figure



http://img189.imageshack.us/img189/9246/ed96dcopyy.jpg



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 ..