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## Homework Statement

A small rock with mass 0.22 kg is released from rest at point A, which is at the top edge of a large, hemispherical bowl with radius R = 0.60 m (the figure ). Assume that the size of the rock is small compared to R, so that the rock can be treated as a particle, and assume that the rock slides rather than rolls. The absolute value of the work done by friction on the rock, when it moves from point A to point B at the bottom of the bowl, is 0.25 J.

http://session.masteringphysics.com/problemAsset/1000053271/8/YF-07-25.jpg

**Just as the rock reaches point B, what is the normal force on it due to the bottom of the bowl?**

## Homework Equations

## The Attempt at a Solution

I know that its not just the mass times gravity like the normal force usually is because it has a velocity of 3.08 m/s.

I am just not sure how to use this and find the normal force :(

Any suggestions?

Thank you