(Solved): A thin-walled, hollow spherical shell of mass m and radius r starts from rest and rolls withou ...

A thin-walled, hollow spherical shell of mass $m$ and radius $r$ starts from rest and rolls without slipping down the track shown in the figure Points $A$ and $B$ are on a circular part of the track having radius $R$. The diameter of the shell is very small compared to $h_0$ and $R$, and the work done by the rolling friction is negligible. What is the minimum height $h_0$ for which this shell will make a complete loop-the-loop on the circular part of the track? Express your answer in terms of the variables $m,R$, and appropriate constants. Part B How hard does the track push on the shell at point $B$, which is at the same level as the center of the circle? Express your answer in terms of the variables $m,R$, and appropriate constants. $N=$ Figure 1 of 1 Incorrect; Try Again; 3 attempts remaining The correct answer involves the variable $m$, which was not part of your answer. Figure