55. ssm A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to twice her weight as she goes through the dip. If r = 20.0 m, how fast is the roller coaster traveling at the bottom of the dip?

Sum of Forces in Radial direction

 

We are told N = 2mg

 

Solve for v

 

 

 

 

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This page last updated on January 11, 2020