Originally Posted by

**ohman** either im really dumb, or since your giving me things i have never learned its making it harder then it really is.

i'll try to clairify :S

Okay so what i dont understand is how you get a period. In the question the teacher did not give a certain distance. So do i use 50km as a distance and then one hour is the time. but when we ussauly do the graphs time is on the bottom and hight on the side. So basicly im just stuck on how to get the rotations of the wheel. like how many rotations at what time. Its not really clear to me on what goes on the bottom of my graph and how to get it. Otherwise i get the rest, such as amplitude, horizontal translation... etc