mechanical energy problem 3

The video tutorial explores a complex problem involving a block attached to an unstretched spring, sliding down a frictionless circular path. The goal is to determine the block's velocity at the end of the path using mechanical energy principles. The tutorial covers creating a free body diagram, identifying forces, and calculating changes in kinetic, potential, and elastic energy. It concludes with solving for the block's velocity using derived equations.

What is the relationship between the change in mechanical energy and the work done by non-conservative forces?

What are the conservative and non-conservative forces acting on the block?

Why is the work done by the normal force considered to be zero in this scenario?

How do you calculate the change in kinetic energy for the block?