The quantity given was 10 m/s and they wanted to know what that quantity would be if it were converted into km/hr. Notice that the same units are placed diagonally from each other, so they cancel out each other when multiplied.
Using cubed and square unit is a similar process, just a little more complicated. For example, we are going to convert 56 in^3 to cm^3.
56 in^3 x (2.54cm/1in)^3 = 920 cm^3
This is so similar to what we do in A.P. Physics! The only difference is that we have to account for Sig Figs, which I didn't really understand until I checked out Crash Course. I liked the way you summed up the lesson in a brief yet thorough way.
ReplyDeleteI enjoy how you used pictures and also an example at the bottom. It's like a lesson compacted into one small paragraph.
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