(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A small block of mass m = 1.8 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 56.0 m above the bottom of the loop of radius R = 17.0 m. What is the kinetic energy of the mass at the point A on the loop?

What is the downward acceleration of the mass at the point A of the loop?

What is the minimum height h for which the block will reach point A on the loop without leaving the track?

2. Relevant equations

work = mass x gravity x (initial height - final height)

KE = 1/2mv^2

3. The attempt at a solution

For the downward acceleration should I find via forces? If so when the block is at A is both weight and normal force acting on it or just weight, I kind of don't really understand how to do it if that's wrong. For the second part with the minimum height I'm not really sure either do I do that via forces as well?

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# Homework Help: Work done by mass on a loop-the-loop track

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