Chapter 3, Problem 3.11P

A worker applies the forces $\text{P}=-8\text{i}+10\text{j}\text{lb}$ and $\text{Q}=8\text{i}\text{lb}$ to the hand-grips of the electric drill. These forces are equivalent to the force $\text{R}=10\text{j}\text{lb}$ acting at the tip of the drill and the couple ${\text{C}}^R=-110\text{j}\text{lb}\cdot \text{in}\text{.}$ Determine the dimensions a and b.