Last time we introduced flywheels and how a fixed point riding piggyback on a moving flywheel travels the same circular path as its host at a pace that’s measured in units of degrees per second. Today we’ll introduce another unit of measure, the , and see how it’s uniquely used to measure angles of circular motion in units of radians per second.radian
Back in elementary school we worked with protractors and measured an international standard equal to 57.3 degrees that’s used to measure objects rotating in circular motion.radians, If we divide a circle’s value of 360 degrees by the 57.3 degrees that represent a π. Anyone who stayed awake during math class can’t help but remember that π represents a constant value of 3.14, a number that pops up anytime you divide the circumference of a circle by its diameter. No matter the circle’s size, π will always result when you perform this operation. Applying these facts to flywheel the measure of the angleθ increases from 0 radians to 2π radians. Suppose we have a flywheel spinning at
If a
Next time we’ll see how
Copyright 2017 – Philip J. O’Keefe, PE Engineering Expert Witness Blog ____________________________________ |

Tags: angular velocity, degrees, engineering, flywheel, kinetic energy, radians, revolutions per minute, RPM