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## Homework Statement

Find the net torque on the wheel in the figure below about the axle through

*O*, taking

*a*= 13.0 cm and

*b*= 31.0 cm. (Assume that the positive direction is counterclockwise.)

pic: https://fbcdn-sphotos-c-a.akamaihd...._=1470130918_26fa32f17821823200ba75439cef0a52

[/B]

## Homework Equations

τ=f⋅d[/B]## The Attempt at a Solution

just sum all for torque, I thought you could just go

τ

_{1}=9.0N ⋅ 0.31m = 2.79 n⋅m

τ

_{2}=10.0N⋅0.31 = 3.1 N⋅ m

but the torque component with the angle shown, I calculated it the same and then summed all the values of torque together, and it said it was wrong, so im assuming that you have to add something like a cosine or sine into that component because it isnt in a horizontal or vertical direction but 150° below the horizontal (positive x axis) any tips on how to solve this,????