Dry air is very capable of staying in one place
It need not have any speed at all.
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).
1920ft.
48 inches/min = 48*(1/12)*(1/60) ft/sec = 3/60 ft/sec = 0.05 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)
69 miles per hour = 69*5280 = 364320 feet per hour =364320/60 ft per minute = 6072 feet per minute = 6072/60 ft per sec = 101.2 ft per sec = 101.2*8 ft after 8 sec = 809.6 ft
The acceleration of gravity is 32.1 ft/sec2 .After 3 seconds, the rock's downward speed is (3 x 32.1) = 96.3 ft/sec.(96.3 ft/sec) x (1 mi / 5,280 ft) = (96.3 / 5,280) (ft - mi / sec - ft) = 0.0182 mile/sec (rounded)
If you can commit some relationships to memory, it helps. This is one: 60 mph = 88 ft per sec. Divide both sides by 10 --> 6 mph = 8.8 ft per sec. So (600 ft)/(8.8 ft/sec) = 68.182 sec, or 1 minute, 8.182 seconds.
Using the ratio of 60 MPH = 88 Ft per Sec Distance = Rate x Time or T = D/R R = 37 MPH (88/60) =or= 54.267 Ft Per Sec T = D/R = 40 Ft / 54.267 Ft per Sec = 0.737 Sec
(88 ft/sec) x (3,600 sec/hr) / (5,280 ft/mi) = 60 mi/hr
The velocity of a ball thrown at 16 ft/sec is 16 ft/sec. This means that the ball is moving at a constant speed of 16 feet per second in a particular direction.
157/360 ft/sec = 0.436 ft/sec
(200 ft/sec) x (1mile / 5280 ft) x (3600 sec / hour) = (200 x 3,600 / 5,280) (ft - mile - sec / sec - ft - hour)= 136.364 miles per hour (rounded)