- #1

Fusilli_Jerry89

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## Homework Statement

A bicycle has 30cm radius tires with gear and pedal dimensions as shown. IF the maximum vertical force that a 70kg rider can exert is equal to his/her body weight, what is the horizontal force that can be exerted on the ground by the rear tire?

http://img48.imageshack.us/img48/8492/28mn1.png

## Homework Equations

same as Spool question

## The Attempt at a Solution

well first I got 686 N [70x9.8] but I have no idea what point to use as the pivot.

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