Posted by **pam** on Thursday, March 24, 2011 at 10:14pm.

A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

- physics -
**drwls**, Friday, March 25, 2011 at 2:04am
V^2/R = g. Solve for V

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