# Rollercoaster

### The science behind the ride!

The Beast Wooden Roller Coaster POV Legendary Classic Woodie at Kings Island Ohio HD 1080p

## Vocabulary/Definitions

force: Any push or pull.

gravity: A force that draws any two objects toward one another.

speed: How fast an object moves. Is equal to the distance that object travels divided by the time it takes.

velocity: A combination of speed and the direction in which an object travels.

critical velocity:The speed needed at the top of a loop for a car to make it through the loop without falling off the track.

acceleration: How quickly an object speeds up, slows down or changes direction. Is equal to change in velocity divided by time.

friction: A force caused by a rubbing motion between two objects.

potential energy:The energy stored by an object ready to be used.

kinetic energy: The energy of an object in motion, which is directly related to its velocity and its mass.

gravitational constant:The acceleration caused by Earth's gravity at sea level. Is equal to 9.81 m/sec^2 (32.2 ft/sec^2).

g-force: Also known as a gravitational force. Is equal to the force exerted on an object by the Earth's gravity at sea level.

## Physics

• Motion Things move in many different ways.
• Objects need a push or pull to start, stop, or change their movement.
• Simple machines help move objects.
• Friction can change motion.Motion
• The world around us is always in motion.
• Motion occurs whenever something changes place or position.
• Movement can be in a straight line, crooked line, zig-zag, circular, or back and forth. Things can roll, bounce, slide, and fall.

In order to make something move, force is required. Force can be most easily described as a push or a pull. People and other animals use their muscles to produce the force required to move themselves or other things. The amount of force needed to move an object depends on the object’s mass. More force is required to move objects with a larger mass than to move objects with a smaller mass. Force can slow or stop objects as well. Friction is a force that is created when two objects come into contact with each other—such as a ball rolling on the ground. Eventually, friction will slow the ball to a complete stop. A bumpy surface will slow the ball more quickly than a smooth surface. Wheels and ramps make work easier by changing the size or direction of a force. They are examples of simple machines.