A small block slides without friction on the inside of a fixed vertical circular track. Which statements are correct while contact is maintained?
Select all that apply

Question

A small block slides without friction on the inside of a fixed vertical circular track. Which statements are correct while contact is maintained?

G1 Physics · Accepted Answer

For a block on the inside surface, the normal is radially inward. It is perpendicular to displacement, hence zero work. At the top both N and mg point inward. Contact is lost at the limiting condition N=0.