## Homework Statement

http://img684.imageshack.us/img684/4316/capturerey.jpg [Broken]

## The Attempt at a Solution

I am completely stuck on this. I thought I would use W=F=ma, but that wouldn't take the height into account. Any help would be greatly appreciated

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To find the velocity at the second peak, you can use conservation of energy:

$\displaystyle ΔU_g = mgΔh$
Ug is potential gravitational energy

$\displaystyle K_E = -ΔU_g = \frac{1}{2} mv^2$

And to find the apparent weight of the passenger, you can use the circular motion equation:

$\displaystyle F_{net} = \frac{mv^2}{r}$

Hope that helps.

PhanthomJay