Chapter 11, Problem 65GP

A particle of mass 1.00 kg is moving with velocity $\stackrel{\to }{v}=(7.0\hat{i}+6.0\stackrel{\to }{j})\text{ m/s}$. (a) Find the angular momentum $\stackrel{\to }{L}$ relative to the origin when the particle is at $\stackrel{\to }{r}=(2.0\hat{j}+4.0\hat{k})\text{ m}$. (b) At position $\stackrel{\to }{r}$ a force of $\stackrel{\to }{F}=4.0\text{ N}\hat{i}$ is applied to the particle. Find the torque relative to the origin.