- #1
SherBear
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Homework Statement
The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 46m--diameter loop-the-loop.
Homework Equations
What is the car's speed at the top?
The Attempt at a Solution
the answer is in m/s
I have several equations but I really don't know what to do with them...
the sum of Fr=nr+(Fr)r=n+mg=m(Vtop)^2/r
and n=m(Vtop)^2/r-mg
Vc=SQRTrmg/m=SQRTrg
wc=SQRTg/r
I'm really lost on this one.