Convert unit measures for a problem from zill book
I have the solution, but I don't understand it, I don't understand the part which implies the conversion of unit measures. I know that I can , but then what? So my questions are:
1. how to compute (convert unit measures) to become ?
pound is a unit measure for weight, ft is for distance (like meter), s is for time. So, how they (in image) simplify that raport - division?
2. Then, for the next step: I know that , with slug and . But what about this division:
And again, how can I make this division? lb and slug are units of measure for weight and ft is for distance. How can I reduce them?