The angular momentum vector of a precessing gyroscopesweeps out a cone as shown in
Chapter 11, Problem 43(choose chapter or problem)
The angular momentum vector of a precessing gyroscopesweeps out a cone as shown in Figure P11.43. Theangular speed of the tip of the angular momentum vector,called its precessional frequency, is given by vp 5t/L, where t is the magnitude of the torque on the gyroscopeand L is the magnitude of its angular momentum.In the motion called precession of the equinoxes, theEarths axis of rotation precesses about the perpendicularto its orbital plane with a period of 2.58 3 104 yr.Model the Earth as a uniform sphere and calculate thetorque on the Earth that is causing this precession.
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