PHYS 2 Chapter Notes - Chapter 10.6-10.7: Angular Velocity, Normal Force, Gyroscope
Document Summary
The torques of the internal forces can transfer angular momentum from one body to the othere, but they can"t change the total angular momentum of the system. Principle of conservation of angular momentum = when the net external torque acting on a system is zero, the total angular momentum of the system is constant (conserved) When a system has several parts, the internal forces that the parts exert on one another cause changes in the angular momenta of the parts, but the total angular momentum doesn"t change. If , then , and is constant (zero net external torque) is the total angular momentum of the system. Flywheel: origin is at the pivot, the flywheel is symmetrical with mass and moment of inertia about the flywheel axis. The only external forces on the gyroscope are the normal force acting at the pivot (assumed frictionless) and the weight of the flywheel that acts at its center of mass, distance from the pivot.
