# Uniform circular motion Lab

In a lab we were supposed to produce a rollercoaster ramp while it had a loop, and then to drop a marble at a height where it would finish the entire path without falling off, with enough centripetal acceleration at the loop. we were not given the mass of the marble, and we were only given a meter stick to determine any measurements eg. (height, radius, etc..). We must account for friction.

http://session.masteringphysics.com/problemAsset/1041727/8/YF-07-32.jpg

We must find the velocity at the bottom, side and top of the loop. As well as the g force at each point in terms of mg.

so we did it using conservation of energy to figure out the velocity of the ball at many paths, but we were told to account for friction. (we were not given the mass of the marble, the coeficient of friction, or the efficiency of a ramp). is this problem possible? and how would it be done.

our teacher also said this lab can be done using kinematics as well. how would this be done using kinematics?

thanks

K^2