Use the Talk Test to check the safety level of your cardiovascular activity. Reflection Questions: Did you pass the Talk Test during this activity? If yes, could you talk while exercising for the whole activity? If no, what did you do to safely lower your exercise level? What benefits do you think you are getting by doing this activity? Warm-up: Cardiovascular Activity 2: Cool-down:

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