1) Classic rollercoasters are appropriately named because the cars do not have any engines or propulsion and coast along the track after they are pulled to the top of the first large
hill (Point A) by large chains connected to motors on the ground which gives them stored,
gravitational potential energy. Picture the first hill of 140 meters high with a steep drop
below all the way to ground level. Ignoring friction between the all the car wheels and the
track, as well as air resistance (drag), what would the velocity of the cars be at the bottom
of the hill (Point X).
B
140 m
A
- 120 m
95 m
с
80 m
D
х