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Normal Force and Weight

 
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Nov21-06, 02:02 AM   #1
 

Normal Force and Weight


A car travels at a constant speed of 23 m/s through a small valley whose cross section is like a circule of radius 310 m. What is the magnitude of the normal force on the car, expressed as a multiple of the car's weight?

what does it mean by the cross section and how does it relate to the problem?
 
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Nov21-06, 02:17 AM   #2
 
You can assume the valey is sort of a semi-cylinder and the car travels on the circular part of it.
 
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