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Hannisch
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Homework Statement
A mass m starts at rest on a frictionless track a distance H above the floor. It slides down to the floor-level where it encounters a loop of radius R.
A) What is the minimum height H for which the object makes around the loop without losing contact with the track?
B) What is the height H for which the normal force on the block by the track at the top of the loop is equal to the weight of the block?
Homework Equations
[tex]F_cp =\frac{mv^2}{R}[/tex]
Conservation of mechanical energy
The Attempt at a Solution
A) I found another thread on here discussing this question (plus, most of this I could've worked out by myself), (w_ww.physicsforums.com/showthread.php?t=218700&highlight=Roller+coaster[/url]), however I need an explanation of this section:
with [tex]\frac{v^{2}}{R} = g[/tex] code for this image remove all g from equation. because i need V^2/r to be equal to g or the coaster won't make it past b,,, is my thinking wrong?
B) This is the problem. I've been discussing it with my group and we're all at a loss. Help?
Oh, and I'm sorry if I don't know the all the correct signs for everything. I go to a fairly small school in Sweden, so I don't know what's used outside our school, really.
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