What Is Centripetal Acceleration?

I Tree
Homework Statement
Consider a rider at the following points while riding a Ferris Wheel that is rotating counter-clockwise in a circle at a constant speed:
A.The rider is at the top of the Ferris Wheel
B.The rider is at the side of the Ferris Wheel, moving down
C.The rider is at the bottom of the Ferris Wheel
D.The rider is at the side of the Ferris Wheel, moving up


a. In which of the above scenarios is your apparent weight the lowest?
Explain why this is the case (draw a free body diagram to help with your explanation, try to be accurate with the scale)

b.In which of the above scenarios is your apparent weight the highest?
Explain why this is the case (draw a free body diagram to help with your explanation, try to be accurate with the scale)
Relevant Equations
F = mv^2/R
Unsure
 
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Thread 'Chain falling out of a horizontal tube onto a table'

Thread 'Chain falling out of a horizontal tube onto a table'

My attempt: Initial total M.E = PE of hanging part + PE of part of chain in the tube. I've considered the table as to be at zero of PE. PE of hanging part = ##\frac{1}{2} \frac{m}{l}gh^{2}##. PE of part in the tube = ##\frac{m}{l}(l - h)gh##. Final ME = ##\frac{1}{2}\frac{m}{l}gh^{2}## + ##\frac{1}{2}\frac{m}{l}hv^{2}##. Since Initial ME = Final ME. Therefore, ##\frac{1}{2}\frac{m}{l}hv^{2}## = ##\frac{m}{l}(l-h)gh##. Solving this gives: ## v = \sqrt{2g(l-h)}##. But the answer in the book...
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