Does 4000 RPMs produce 25 miles per hour?

Answer 1

Yes. No. Maybe. You see, it is not the number of revolutions per minute that determines the speed of an object, but it's the relation of the rpms and the size of the wheel and the gears that is causing the item to move. A car has many different gears. In first gear at 4,000 rpms the car will not go it's fastest because it is not turning the wheel at the same speed as the engine is spinning. The higher the gear the faster the vehicle will move. The higher the gear the less the engine has to spin to acheive faster speeds. If the wheel actually turned at 4,000 rpms and it was very small the vehicle may not move very fast. If you put a very large wheel on it and had it turn at 4,000 rpms then it would go very fast. Picture this: a small wheel may have an outside circumference of 6 inches. So every one revolution per minute it will cover a distance of 6 inches. A very large wheel with a circumference of 100 inches will cover 100 inches for each revolution. So a 6 inch wheel spinning at 4,000 rpms will travel 24,000 inches in one minute. (6 X 4,000) and a 100 inch wheel spinning at 4,000 rpms will travel 400,000 inches in one minute. (100 X 4,000) So in one hour which one will cover the most distance? The larger wheel. The more distance traveled in the same amount of time; the faster it is going.