During a trampoline routine, a gymnast is tumbling in the air at 20 rad/s in a tuck position. he then extends into a layout position and doubles his radius of gyration just before landing on the trampoline bed. how fast is his angular velocity at this instant, just before landing on the trampoline bed? group of answer choices 5 rad/s 10 rad/s 5 m/s 4 rad/s 80 rad/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