Easy. The conversion factor is 1.466. So, 70 mph x 1.466 = 102.62 feet per second.
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(mph x 1.466 = feet per second). So, 70 mph x 1.466 = 102.62 feet per second.
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.
8.5 ft/sec = 8.5*3600/5280 = 5.8 mph (approx)
1100-1300 ft/sec
1. If they trains are traveling away from each other he observes the train at a relative velocity of 112 mph (63 + 49) 2. To get the answer we must multiply the velocity times the time. 3. The hardest part about this problem are the units. 4. Convert mph to feet per sec, then multiply times 4.5 sec to get the answer in feet. Answer= 739.2 feet