일반물리학 1 — Rolling, Torque, and Angular Momentum: Problem 25

25 A force \(\vec{F} = (6.00 \hat{i} - 4.00 \hat{j}) \text{ N}\) acts on a particle with position vector \(\vec{r} = (-3.00 \hat{i} + 1.00 \hat{j}) \text{ m}\). Find (a) the torque about the origin acting on the particle and (b) the angle between \(\vec{r}\) and \(\vec{F}\).