A 2.0-kg block travels around a 0.50-m radius circle with anangular speed of 12 rad/s. the circle is parallel to the xy planeand is centered on the z axis, a distance of 0.75 from the origin. the z component of the angular momentum around the origin is:. a) 6.0 kgm2/s
b)9.0 kg m2/s
c)11 kgm2/sd)14 kgm2/s
e)20 kgm2/s

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