Posted by **Amanda ** on Thursday, October 27, 2011 at 2:49pm.

A roller coaster cart with a mass of 13 kg travels around two frictionless, circular loops. It just barely makes it around the top of the first circular loop which has a radius of 24 meters. It then travels around the other loop with a radius of 14 meters. What is the normal force at the top of the second loop in Newtons?

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