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## Homework Statement

A 5.4g mass is released from rest at C which has a height of 1.2m above the base of the loop-the-loop and a radius of .36m

Finde the normal force pressing on the track at A, where A is at the same level as the center of the loop. Answer in units of N

So the picture is of a ball (at point C) at the top of a 1.2m slope that goes down into the beginning of the loop the loop where point A is at 0

^{o}from the center of the radius and point B is at the top of the loop.

## Homework Equations

1/2mvf

^{2}+PE

_{i}=1/2mv

_{f}

^{2}+PE

_{f}

Sum of all of the forces is = to ma

_{c}or mass times the centripetal acceleration.

## The Attempt at a Solution

I need to make and equation that works for this problem but I don't know where to start.