The particles in Figures are connected by a very light rod whose moment of inertia can be neglected. They rotate about the y axis with angular velocity ω = 2 rad/s.
(a) Find the speed of each particle, and use it to calculate the kinetic energy of this system directly from ∑1/2mivi2.
(b) Find the moment of inertia about the y axis, and calculate the kinetic energy from K = ½Iω2.
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