A B. C R An amusement park ride consists of a large vertical wheel of radius R that rotates counterclockwise on a horizontal axis through its center, as shown above. The cars on the wheel move at a constant speed v. Points A and D represent the position of a car at the highest and lowest point of the ride, respectively. A person of weight Fg sits upright on a seat in one of the cars. As the seat passes point A, the seat exerts a normal force with magnitude 0.8Fg on the person. While passing point A, the person releases a small rock of mass m, which falls to the ground without hitting anything.

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Chapter11: Angular Momentum
Section: Chapter Questions
Problem 55P: A diver off the high board imparts an initial rotation with his body fully extended before going...
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Q: The kinetic energy of the rock when it is at the same height as point D is most neatly 

Image 2 - possible answers.

How to get to the right answer D?

A
B) 2mgR
4mgR
C
D m (v? + 4gR)
Transcribed Image Text:A B) 2mgR 4mgR C D m (v? + 4gR)
A
C
An amusement park ride consists of a large vertical wheel of radius R that rotates counterclockwise on a horizontal
axis through its center, as shown above. The cars on the wheel move at a constant speed v. Points A and D
represent the position of a car at the highest and lowest point of the ride, respectively. A person of weight Fg sits
upright on a seat in one of the cars. As the seat passes point A, the seat exerts a normal force with magnitude 0.8Fg
on the person. While passing point A, the person releases a small rock of mass m, which falls to the ground
without hitting anything.
Transcribed Image Text:A C An amusement park ride consists of a large vertical wheel of radius R that rotates counterclockwise on a horizontal axis through its center, as shown above. The cars on the wheel move at a constant speed v. Points A and D represent the position of a car at the highest and lowest point of the ride, respectively. A person of weight Fg sits upright on a seat in one of the cars. As the seat passes point A, the seat exerts a normal force with magnitude 0.8Fg on the person. While passing point A, the person releases a small rock of mass m, which falls to the ground without hitting anything.
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