Twin skaters approach one another as shown in the figure below and lock hands. (0) (a) Calculate their final angular velocity, given each had an initial speed of 2.90 m/s relative to the ice. Each has a mass of 75.0 kg, and each has a center of mass located 0.820 m from their locked hands. You may approximate their moments of inertia to be that of point masses at this radius. rad/s

A physics teacher on a spinning chair has a moment of inertia of 5.5 kg m^2 with his arms outstretched. When he pulls his arms in, his moment of inertia is reduced to 1.7 kg m^2. If he starts with arms outstretched with an angular velocity of 13 revolutions per minute, what will his angular velocity be when he pulls his in his arms??

Twin skaters approach one another as shown in the figure below and lock hands. (a) Calculate their final angular velocity, given each had an initial speed of 2.10 m/s relative to the ice. Each has a mass of 84.0 kg, and each has a center of mass located 0.760 m from their locked hands. You may approximate their moments of inertia to be that of point masses at this radius. rad/s (b) Compare the initial kinetic energy and final kinetic energy. O Initial kinetic energy is the same as final kinetic energy. O Initial kinetic energy is less than final kinetic energy. O Initial kinetic energy is greater than final kinetic energy.

A 8 kg point mass is at coordinates (9 m, 1 m), a 8 kg mass is at (-4,9) and a 8kg mass is at (x,y) of (8,-5).  Find the moment of inertia about the x axis.  Find Iz = __________ kg-m2