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## Homework Statement

Below is the image of the question I am having trouble with.

B) and C) I need help with!

## Homework Equations

## The Attempt at a Solution

Can anyone point me in the right direction? B and C are my trouble questions.

I dont know how to prove that the small object will slide back and forth

inside the track in simple harmonic motion with period

T = 2π sqrt (r/g)