Use unit multipliers to convert 16 feet per second to mph?

Answer 1

(16 ft/sec) (60 sec/1 min)(60 min / 1 hr)(1 mile/5280 ft)

Answer 2

Unit multipliers (or conversion factors) can be arranged in "daisy chain" of fractions such that the units in the numerators and denominators "cancel out", leaving you with the answer.

Start with feet/sec and work from there with a target of mi/hr

16 feet/sec x 60sec/min x 60min/hr gives you 57600 feet/hr

now can convert that to miles/hr.

57600 feet/hr x 1 mi/5280 feet = 10.9 mi/hr. Can do in one chain, I just broke it into two parts for demo purposes.

For this particular conversion, it's helpful to know that 88ft/sec = 60 mi/hr.

You can set up a proportion to solve for the equivalent of 16 ft/sec and get the same result as above.