A dumbbell-shaped object is composed by two equal masses, m, connected by a rod of negligible mass and length r. If Iâ is the moment of inertia of this object with respect to an axis passing through the center of the rod and perpendicular to it and Iâ is the moment of inertia with respect to an axis passing through one of the masses we can say that .
a. lâ = lâ.
b. lâ > lâ.
c. lâ > lâ

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants