In the figure of problem 17 if the block starts from rest when R = 5r, what is the reaction of the inner track on the sliding mass at the highest point ? From what height should it fall so that it may exert a force equal to its weight on the track at the highesth point ?

In the figure of problem 17 if the block starts from rest when R = 5r,

1.	In the figure of problem 17 if the block starts from rest when R = 5r, what is the reaction of the inner track on the sliding mass at the highest point ? From what height should it fall so that it may exert a force equal to its weight on the track at the highesth point ?
Answer» ANSWER :5 MG, 3R