- #1
rbn251
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Homework Statement
Hi, I am stuck on this thought experiment:
A roller coaster of mass m starts on a inclined plane at a certain height, and then enters a circular loop, with radius r. At what height, h on the plane, must the trolley start in order to stop at the exact top of the loop, and then what happens?
Homework Equations
gpe=g*h*m
total energy = KE + PE
The Attempt at a Solution
In the beginning the trolley has only PE which is ghm (for h unknown)
At the top of the loop, again KE is zero, and PE is g(2r)m.
So h=2r (ie same height as the loop), and the trolley falls vertically down.
Is this correct? Thanks,