1. A particle with mass m is moving in a vertical circle of radius R inside a track. There is no friction. (a) What is the minimum value of speed vena at the top for which the particle will go around the circle? VRq (b) What will be the speed at the bottom of the track vantom when the speed at the top is minimum? V5 Rq (a) Suppose vanam is less than what you calculated in part b and it is equal to v. =0. 75Vattominpartb) as shown in the figure. The particle will move up the track to some point Pat which it will lose contact with the track and travel along a path shown roughly by the dashed line. Find the angle 0 of point P. 15.70