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## Homework Statement

The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 60m diameter loop-the-loop.

## Homework Equations

What is the car's speed at the top?

## The Attempt at a Solution

hello, this problem doesn't give much information

would normal force be pointing down?

so Fnet= ma=mv^2/r but its doesnt give those variables

can anyone help?

thanks :)