A 900 kg roller coaster car starts from rest at point A. rolls down the track, goes around a loop (points B and C) and then flies off the inclined part of the track (point D),
Figure 2.
The dimensions are: H =80 m.
r= 15m, h=10m and theta =9.30°

Calculate the
(a) gravitational potential energy at point A.

(b) velocity at point C, if the work done to move the roller coaster from point B to C is 264870 J.

c) distance of the car land (in the horizontal direction) from point D if given the
velocity at point D is 37.06 m/s

I