by building it RUDE
Bohr
A simple model involves using thermocol. Drawing water cycle on its surface.
Whenever one object exerts a force on a second object the second object exerts an equal and opposite force on the first. Since a roller coaster is on a ramp, the ramp has to support the (apparently larger) weight of the roller coaster, especially when it turns it back up against gravity at the bottom of each incline. The rollers on each car also prevent the cars from leaving the track on turns, by exerting a controlling force using the sides and upper half of the track.
by shiela and munni and breast
it is too big
You could buy a k'nex roller coaster, Icoaster, RCT3, Nolimitscoaster or just make one using wire for supports and use aluminum foil for the track.
A roller coaster can accelerate using an electromagnetic field or linear motor. Another way for a roller coaster to accelerate is by using a hydraulic launch method. using cables to catapult the ride forward.
500
using windows movie maker
Brakes, either using friction or magnets, are used to slow down or stop the train usally at the end of a roller coaster ride.
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It is easier to see this using a traditional roller coaster model. Most traditional Roller Coasters start by using a tow cable to pull them up a large "hill". When being pulled up this hill, mechanical energy is being used to give the roller coaster potential energy. At the top of this hill, the roller coaster has it's maximum potential energy. As it starts to go down another hill, it picks up speed. During the descent it is losing potential energy but at the same time gaining kinetic energy. The coaster will then lose kinetic energy but gain potential energy as it goes up the next hill. This cycle of gaining/losing potential and kinetic energy is the conservation of energy that you are looking for. Of course in a real roller coaster, some energy will be lost due to friction. This will come off as heat in the rails and the wheels of the roller coaster and it's structure.
The roller coaster seen in that commercial is Boomerang at Knott's Berry Farm. Using that, I'm assuming it was somewhere in southern California.
Some people have difficulty making clean slices of ham. Using spiral cut hams makes it easy to get clean slices.
Spiral curling
A lock of hair hanging down in a spiral curl is known as a ringlet. People who have straight hair can achieve ringlets by using a curling iron.
In Design Technology, a twisting is know as TORSION