Great start--100 points.

One of the most basic forces that stops a moving object is friction. Because most objects do not exist in a vacuum, they are encountering other, often not visible, objects as they move. Some of the kinetic energy of the moving coaster is transferred to other objects that it encounters as it moves and the coaster gradually slows down as it travels down the track, but to bring a roller coaster a complete stop, a braking device will absorb some of the energy but convert it to heat rather than kinetic energy. Some coasters also have an incline before the braking area (converting the kinetic energy into potential energy) so that the design of the track does some of the slowing without applying a mechanical device.
Now try again.

Ready for the next question?
Galileo articulated the idea that two objects of different weights will fall at the same accelerating speed. If you dropped a small parachute out of a off the top of a 200 foot ride that has you falling in freefall for a short period of time, why would it reach the bottom after you do?
A. Because you were pulled down by the straps in the car.
B. Because Newton proved Galileo was wrong and weight affects the rate of descent.
C. Because the force created by the gravity pulling the parachute down is reduced by the amount of friction the parchute would generate during its drop.