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## Homework Statement

A bicycle of a mass 15kg resting in a vertical position, with the front and back wheels touching the horizontal ground at points P and Q respectively, where PQ=1m. The centre of gravity of the bike is vertically above O, a point on PQ where PO=30cm.

Given that the normal reactions of the ground on the front and rear where are R

_{1}and R

_{2}, write 2 equations in R

_{1}and R

_{2}which satisfy the conditions of equilibrium.

## The Attempt at a Solution

So I know you have to use the principle of moments to give the equations. I am just unsure where the pivot is. Is it at the line of center of gravity of the bicycle?