Acceleration is the rate at which velocity changes. A roller coaster accelerates whenever it speeds up, slows down, or changes direction.
Newton’s First Law (inertia): An object continues moving at a constant velocity unless acted on by a net force. A roller coaster’s motion changes because of forces such as gravity, friction, and forces from the track.
Newton’s Second Law: F = ma. The greater the net force on the coaster, the greater its acceleration. For example, gravity causes the coaster to accelerate as it travels downhill.
Newton’s Third Law: For every action, there is an equal and opposite reaction. The coaster pushes against the track, and the track pushes back against the coaster.
Roller coasters also demonstrate energy transformations. At the top of a hill, the coaster has gravitational potential energy. As it travels downhill, this energy changes into kinetic energy and the coaster speeds up. During loops and turns, forces from the track produce centripetal acceleration, changing the coaster’s direction.
Therefore, roller coasters are excellent examples of acceleration, forces, energy, and all three of Newton’s Laws working together.
