Fellas! Please help me out with work and Energy!
A small block of mass m slides along the frictionless loop-the-loop track shown
in the figure below.

(a) At what height above the bottom of the loop should the block be released so
?that it is on the verge of losing contact with the track at the top of the loop?

The diameter is 1 meter

Question

Fellas! Please help me out with work and Energy! 
A small block of mass m slides along the frictionless loop-the-loop track shown
in the figure below.

(a) At what height above the bottom of the loop should the block be released so
?that it is on the verge of losing contact with the track at the top of the loop?

The diameter is 1 meter

anonymous · Answer

attachment

anonymous · Answer

Can someone just approve my answer? I came to 1.25 m. Is it correct?

anonymous · Answer

the diameter is 1 meter

anonymous · Answer

Attached herewith a photo of the problem as well

ameerry · Answer

It only needs to be at a hight of 1 meter, since track is frictionless , the object won't lose any of it's energy it had at one meter at the beining, o it'll be able to reach the 1 meter threashold in the loop

anonymous · Answer

It's not 1 m, we had an online exam, and I pressed 1 m and I was wrong

anonymous · Answer

Ameerry is right it id only 1 meter

anonymous · Answer

Are you sure about it?

anonymous · Answer

but how can you tell the initial height was 1 m at the beginning? Just because the diameter is 1 m?

anonymous · Answer

I believe it is 1m.

anonymous · Answer

but they've told you only that the diameter is 1 m, how can you assume it's the initial height?

surry99 · Answer

something is not correct here...either the question or the answers.
Is this a multiple choice question and if so what are the options?

anonymous · Answer

no that's the question and no multiple choices....