Answer:
110m
Explanation:
We need first have a couple of equation to give a relation between the maximum force and the centrifugal foce.
We know that the maximum force F=mg, that is the condition for the coster to just stay on the track.
In the other hand we know that the centrifugal force is given by,
where r is the radius of the loop and v the velocity of the coaster.
Assume that both equation are equal, then
The velocity of the coaster is given by,
Where h=55m and g=9.8m/s^2
Replacing
The maximus radius of the loop is,