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r19ecua
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Homework Statement
A small block of mass m = 5kg slides along the frictionless loop-the-loop track shown in the figure. R = 2m
a) If it starts from rest at P, what is the resultant centripetal force acting on it at Q?
b) At what height from the bottom of the loop should the block be released so that the force it exerts against the track at the top of the loop equals its weight?
c) What is the difference between the force at the top and the bottom?
Homework Equations
m*v^2/r
1/2mv^2f + mgyf = 1/2mv^2i + mgyi
This is as far as I know..
The Attempt at a Solution
Well I thought this was a simple conservation of energy problem, and then it HAD to involve centripetal force. Now I have no idea how to approach this problem :( This is a review problem, please help!