3. [l2 Points] - OSCOLPHYS16.P.028.WA. Module 'q ASKYOUR TEACHER A father fashions a swing for his children out of a long rope that he fastens to the limb of a tall tree. As one of the children swings from this rope that is 6.50 m long, his tangential speed at the bottom of the swing is 8.95 m/s. I. \\c gli'} V (a) What is the centripetal acceleration, in m/sz, of the child at the bottom of the swing? (b) What provides the centripetal force that keeps the child moving in an arc? O the height of the tree O gravitational acceleration O the tension in the rope O the weight of the child Supporting Materials , Physical Constants Submit Answer 4. [/1 Points] OSCOLPHYS1 6.P.023.WA. ASK YOUR TEACHER A rotating space station is said to create "artificial gravity"a loosely-defined term used for an acceleration that would be crudely similar to gravity. The outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the oor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. If the space station is 250 m in diameter, what angular velocity would produce an "artificial gravity" of 9.80 m/s2 at the rim? [3 rpm