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## Homework Statement

How many revolutions per minute would a 15m diameter Ferris wheel need to make for a person to feel 'weightless' at the topmost point?

## Homework Equations

F= mv~2/r - mg

v = 2pi r/ T

## The Attempt at a Solution

I get 8.57 m/s using the equation F= mv~2/r - mg

I think I need to use v = 2pi r/ T to figure out T. If I do this, I get T=5.49. I have no idea if this is right. If it is, then I'm not sure what 5.49 represents and how to turn it into rev/minute. The answer is supposed to be 11 rev/min.