Force:

$\overline{){\mathbf{F}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{\u2206}\mathbf{U}}{\mathbf{\u2206}\mathbf{y}}}$

(From W = Fd cosθ and W = −ΔU)

**A.**

At y = 0.5m, we consider the slope of the first part of the motion between y = 0m and y = 1m.

A system in which only one particle can move has the potential energy shown below. Suppose U_{1 }= 88 J

A. What is the y-component of the force on the particle at y = 0.5 m?

B. What is the y-component of the force on the particle at y = 4 m?

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