Urgent Help Needed: Can't Figure Out Homework Problem

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SUMMARY

The forum discussion revolves around a homework problem requiring assistance with physics concepts related to motion and trigonometry. Key hints provided include using the setup in the provided figure for part (a), applying the formula for velocity in part (b), and addressing a potential error in the original question regarding the variable 'r' in part (c). Participants are encouraged to show their work for further assistance.

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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!
 
Last edited by a moderator:
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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 ..
 
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