Answer:
I'm not sure but I think it's 35-39
That is true because if the object is moving at Forceful speeds than it will lose more of its kinetic energy
Answer:

Explanation:
m = Mass of roller coaster = 2000 kg
r = Radius of loop = 24 m
v = Velocity of roller coaster = 18 m/s
g = Acceleration due to gravity = 
Normal force at the point will be

The force exerted on the track is
.
A coil of insulated wire around an iron core
Gravity affet everything and it touches nothing.
Hope this helps!