Physics

Problem

A force

\vec{F}=(a,b,0)

N is applied at the point

P(1,2,0)

m. The force lies in the plane

x+2y=0

and produces a torque

\vec{\tau}=(0,0,9)

N m about the origin. What is the magnitude of the force? a)

6.71\ \text{N}

4.60\ \text{N}

4.02\ \text{N}

5.03\ \text{N}