Yes.
20 ft/s is approx 13.6 mph.
A marble in my pocket when I'm cycling can be going at speeds up to around 35 mph (or about 51 ft/s).
A marble in a car can be going twice this at about 100 ft/s.
It can't be done. 20 feet per second per second is acceleration, but mph is a speed.
20 knots is equivalent to approximately 10.29 meters per second.
Between 15 and 20 times.
At 20 mph, the speed is equivalent to approximately 29.33 feet per second. This conversion is based on the fact that 1 mile per hour is equal to 1.46667 feet per second.
20 mph = 29.3 feet per second.
20 meters per second. This is because the acceleration due to gravity is equal to 20 meters per second per second, meaning the object's speed increases by 20 meters per second for each second of free fall.
20 miles per hour = 8.94 metres per second (approx).
2,000 newtons
20 mph = 29.33... fps
Acceleration = change in speed/time = (20-5)/3 = 15/3 = 5 units of speed per second. It is not possible to be any more precise because the unit of speed (kilometres per hour, miles per hour, metres per second) is unspecified.
At 20 mph, a car is moving at about 29.3 feet per second.
To calculate acceleration in miles per hour per second, first convert the acceleration from 0 to 60 mph in 3 seconds to miles per hour. 60 mph / 3 sec = 20 mph/sec. So, the acceleration in miles per hour per second is 20 mph/sec.