# Have a question about bike problem

1. Oct 29, 2012

### snoopy82

1. The problem statement, all variables and given/known data
A bicycle is rolling down a circular portion of a path; this portion of the path has a radius of 7.78 m. As the drawing illustrates, the angular displacement of the bicycle is 0.877 rad. What is the angle (in radians) through which each bicycle wheel (radius = 0.330 m) rotates?

2. Relevant equations

3. The attempt at a solution
Basically, what I did to solve the problem was that I multiplied the angular displacement
of the bicycle and the radius of the path. So it was 0.877 x 7.78 and I got 6.82306. To
this number, I divided 0.330, which is angle of bicycle wheel and I finally got 20.7, but
the website says that this is wrong. I tried to put 20.68 and it was still wrong. Can someone
tell me if I did something wrong to do this problem? The unit must be in radians. Thanks.

2. Oct 29, 2012

### haruspex

You've not posted the drawing, but based on the text your answer seems right.