An object consists of a rod (of length 4.0 m and negligible moment of inertia) to which five small 1.0-kg massesare attached, one at each end and one at each point on the rod 1.0 m from each end. (the masses are one meterapart.) the moment of inertia of this object about an axis perpendicular to the rod and through one of the endmasses

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