1 mile = 5280 feet
1 hour = 60 minutes = 3600 seconds
1mph = 1 mile / 1hr
= 5280 ft / 3600 sec
= 22/15 ft per sec
~= 1.467 ft per sec
Therefore to convert mph to ft per sec, multiply by 22/15 (or approx. 1.467).
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1920ft.
60 mph = 88 ft/sec
(125 ft/sec) x (1 mi / 5280 ft) x (3600 sec / 1 hr) = (125 x 3600 / 5280) (ft - mi - sec / sec - ft - hr) =85.227 mph (rounded)
(meters / sec) x (3600 sec / hr) / [(0.3048 meters / ft) x (5280 ft / mi)] 1.438*3600 / (0.3048*5280) = 3.2167144 mi / hr (mph)
60 mi/hr * 1 hr/60 min * 1 min/60 sec * 5280 ft/mi = 88 ft/sec; so 60 MPH is 88 ft/sec. Multiply 88 ft/sec * 6 sec = 528 ft.