Two beads of mass m are positioned at the top of a frictionless hoop of mass M and radius R, which stands vertically on the ground. The beads are given tiny kicks, and they slide down the hoop, one to the right and the other to the left. What is the largest value of m/M for which the hoop will never rise up off the ground?(adsbygoogle = window.adsbygoogle || []).push({});

Two questions, why would the hoop even rise up, and two how exactly do you go about doing this, I figure out most of the FBD but I don't even know if that's relevant to the solution.

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# Tough question on hoops and beads

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