Assignment:
A mass, M, moves on a frictionless track, that includes an inclined plane and a loop-the-loop. If the radius of the loop is R and the incline starts 4 R above base of the track, what is the normal force exerted by the track on the mass at the top of the loop?
A. 0
B. 1 Mg
C. 2 Mg
D. 3 Mg
E. 4 Mg