A dumbbellconsists of two 2-meter diameter spheres, each with a mass of 40 kg, attached to the ends of a 0.6-meter-long, 20 kg slender rod.     1.Findout the moment of inertia of the dumbbell about the y axis and compare it with the moment of inertia about the z axis as shown in the figure. 2.Find out the moment of inertia of the dumbbell about the x axis. 3.Find out the moment of inertia of the dumbbell if the axis of rotation passes through the center of either of the spheres and perpendicular on the slender rod.

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.