Please answer the question.

In 2014, Damian Walters demonstrated that he could run through a vertical loop (after a lot of failed attempts). What minimum running speed did he need to do it? Assume the loop has a radius of 1.70 m, that Damian's mass is 77.9 kg, that he stays in contact with the loop at all times, and (unrealistically) that you can neglect friction and drag forces. IMPORTANT: it's Damian's center of mass that matters when calculating change in height, which is approximately 1.11 m above his feet; it might be useful to draw a diagram of where the center of mass is at different parts of the motion. You can watch this stunt here: https:l/wwwyoutube.com/watch?v=0Tcdut|cEJ4&feature=emb logo Image size: s M L Max