- #1
Lydia22
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Homework Statement
A marble rolls down a track and around a loop-the-loop of radius R. The marble has mass m and radius r. What minimum height h must the track have for the marble to make it around the loop-the-loop without falling off?
Homework Equations
mgh = 1/2mv^2 + 1/2Iw^2
The Attempt at a Solution
mgh= 1/2mv^2 + 1/2mr^2*v^2/r^2
gh=1/2v^2 +v^2
h=3/*2(v^2)/g
At the top of the loop
n+mg=mv^2 /r
it just need the minimum velocity therefore the normal will be zero
v=√gr
h=3/2*r which is incorrect please help