Brakes are used to slow down Roller Coasters. The brakes simply contract together against part of the car and friction brings them to a halt. Another type of roller coaster brake are magnets. The magnets have a force between them that slows the car down.
Two things slow a roller coaster down as it travels over the rails. When the cars are going up hill, gravity slows them. The friction between the wheels and the rails always tends to slow the cars. When the brakes are applied, that friction is increased.
Wind resistance against the direction which the roller coaster is travelling, friction between the wheels and the surface upon which it is rolling and friction between the brakes and the wheels (if applicable) would all contribute to slow the roller coaster down.
Inertia of the ever increasing weight behind the first car steadily pushing forward as the its glides downhill on the rails. This is the same reason an airplane must have a means of slowing down as it goes down in altitude.
Kinetic friction.
friction
gravity
Gravity
Gravity
Thermal energy is heat. Heat is associated with motion (like a roller coaster) because of friction. Friction slows down the speed of an object and changes some of its kinetic energy into heat.
The limiting frictional force is the force that slows down the tennis ball on the roller coaster.
Friction, slows the roller coaster down to a slow enough pace that it eventually stops.
Upside down.
It holds the coaster down. Less friction makes it go faster.
Brakes, either using friction or magnets, are used to slow down or stop the train usally at the end of a roller coaster ride.
they hug the rails HELP ive got a HUGE science taske about rollercoasters and its really hard!
Low friction is very desirable for something such as a roller coaster car, that is intended to move very fast. Friction would slow it down, and would also generate a lot of heat, which might become so extreme as to start a fire. Wheels are not really the only option for friction reduction. For example, magnetic levitation gives even lower friction than wheels do. But it's too expensive a technique to use for a roller coaster.
all friction slows down movement
Yes
It provides undesired slowing of the coaster on its path but it is essential for the brakes to stop it at the station.
sliding friction slows down a sliding object