To convert miles per hour to feet per second, which conversion factor would not be used?

Question

a. 1 hr/60 min
b. 1 min/60 sec
c. 5280 ft/1 mi
d. 1 mi/5280 ft

Answer 1

To convert miles per hour to feet per second, which conversion factor would not be used?

a. 1 hr/60 min
b. 1 min/60 sec
c. 5280 ft/1 mi
d. 1 mi/5280 ft

Answer 2

mi/hr * 1hr/60min * 1min/60sec * 5280ft/mi

Note that the units all cancel out, leaving ft/sec

Actually all of the factors will work, if you divide by 1mi/5280ft.
However, since one usually wants to multiply, I'd say (d) would not be used.

Answer 3

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