10. The following conversions occur frequently in physics and are very useful. (a) Use 1 mi =5280 ft and 1 h =3600 s to convert 60 mph to units of ft / s. (b) The acceleration of a freely falling object is 32 ft / s ^2. Use 1 ft =30.48 cm to express this acceleration in units of m /s ^2.
(c) The density of water is 1.0 g /cm ^3. Convert this density to units of kg/m ^3.