Math Question
5 miles per hour is equivalent to 1 hour per 5 miles, right? So how come you can't say 1/5 h/m +1/5 h/m = 5 m/h +5 m/h? Is there some kind of reciprocal for addition?
I think maybe we treat adding sppeds as fractional addition, but it's actually something else that just happens to look like addition of fractions, but isn't, really.
Comments
If you throw a ball at 1/5 hpm, wait for it to traverse 5 miles, then throw another, the two balls together travel at 2/5 hpm--that is, it takes two hours for the balls to traverse the same 5 miles.