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## Homework Statement

## Homework Equations

## The Attempt at a Solution

4a at x=-2 F=0N

Potential energy=integration of F(-2)=Integration of 0=0 so it will reach minimum at x=-2?

b. integration of F(-2)-integration of F(-2-h)=m(v-0)^2/2

am i right?

5 Centripetal force=mv^2/r=mgsinθ-Fn(normal force)

will the block fall leave surface when Fn=0?

so i can represent the velocity as v=(mgrsinθ)^1/2=((m)(9.8)(15)sinθ)^1/2?