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runningirl
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Homework Statement
You have been hired to design a roller coaster and are working on two sections. The roller coaster rolls on the track, but is not attached.
If the cars will have a speed of 35 m/s at the bottom of the hill, what is the radius that the circular bottom section of the track should have so that the seat exerts a force of 3800 N on an 80 kg rider?
Homework Equations
F=mv^2/r
The Attempt at a Solution
i did:
(80*35^2/R)-9.8(80)=3800
98000/R=4584
R=98000/4584
=21.38 m?
but apparently i did something wrong and got the wrong answer.
can someone help me out??