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## Homework Statement

A small ball of radius 1.9 cm rolls without slipping down into a loop-the-loop of radius 3.7 m. The ball has mass of 353 gm.

How high above the top of the loop must it be released in order that the ball just makes it around the loop, and what is the total kinetic energy (translational plus rotational) at the highest point of the loop?

## Homework Equations

K = 1/2 mv^2 + I W^2

K = 1/2 mv^2 (1 + I/mr^2)

## The Attempt at a Solution

Honestly, I have no idea how to attack this problem. I know that energy is conserved, but really have no idea how to go about solving this problem. Can someone give me an idea of how to start going about this?