# data[].attributes.body
A Heartline roll is where the coaster goes in a spiraling path but in a narrow amount of space as if the track is going through a narrow tube.

# data[].attributes.body
A part in a roller coaster where the car goes in a spiral but like in the way where the path would be narrow as if it went through a tube.

# data[].attributes.body
A part in a roller coaster when the cart goes through a path the shape of a pretzel

# data[].attributes.body
First roller coasters date back to the 17th century when the Russians had ice slides. Theses "roller coasters" were actually just hills of ice. They were usually from 70-80 feet tall. Mostly the people of high class enjoyed these like Catherine II of Russia (she was the longest ruling queen in Russian history). The funny thing is, the ice hills became known as "Russian Mountains" in many languages but the Russians called them "американские горки" (amerikanskie gorki), which means "American mountains". Years later in 1850, a mining company in Summit Hill, Pennsylvania built a gravity railroad used to transport coal, sometimes, they charged people 50 cents for a ride. Lina Beecher looked into the science of a vertical loop. The year is now 1912 and a man named John Miller invented the first underfriction roller coaster. Soon after that, roller coasters became a necessity in amusement parks around the world. The first steel roller coaster was introduced in 1959, at a Disneyland theme park called "Matterhorn Bobsleds". As technology advanced and new technological breakthroughs were made, each roller coaster became better than the last. Some of the world's record roller coasters (fastest, tallest, most visited, etc.) are listed below.

# data[].attributes.headline
Roller Coaster that I would like to ride someday

# data[].attributes.subject
Roller Coaster that I would like to ride someday

# data[].attributes.body
(Click on attachment to see picture, I don't know. Why it wouldn't show up.)

# data[].attributes.body
If you happen to visit Abu Dhabi, you need to go to Ferrari World, home to the world's fastest roller coaster called the "Formula Rossa". The car you get in is the shape of a Formula One race car. This roller coaster blasts you to a speed of 149 miles per hour in less than 5 seconds!

# data[].attributes.body
An extreme roller coaster ride at Six Flags called the "Kingda Ka" is currently the world's tallest roller coaster. With a peak of 456 feet, riders of this masterpiece of metal, engineering, and science are definitely in for a wild ride.

# data[].attributes.headline
Check out this video of our roller coaster in action!

# data[].attributes.subject
Check out this video of our roller coaster in action!

# data[].attributes.body
Potential energy is the energy stored in an object. For example, when a roller coaster goes up a hill, potential energy is being stored because gravity is pulling down on the car and when the coaster goes down the hill, all that force comes out and that's what makes the roller coaster move quickly.

# data[].attributes.body
Kinetic energy is the energy an object has when it is in motion. This usually comes after potential energy. For example, on a roller coaster, when the car reaches the top of the hill and goes down, it gains speed and that motion is kinetic energy.

# data[].attributes.headline
Friction and how it relates to roller coasters

# data[].attributes.subject
Friction and how it relates to roller coasters

# data[].attributes.body
Friction is the process in which two solid surfaces collide against each other causing them to resist motion and generate heat. This can relate to roller coasters because when the car slides along the track of the roller coaster, it moves incredibly fast creating friction, making the metal hot.

# data[].attributes.body
When you feel weightless, for example like in space, you might think there are no "g"s but there is still some but very little so you feel weightless when you actually are not. There are still minuscule amounts of stress and strain but not a lot of it so you are not greatly affected by it. You might feel weightless on a roller coaster if you drop straight down.

# data[].attributes.body
To find the momentum of an object, you multiply the mass and velocity of a moving object together. Momentum can be found in a roller coaster. For example, a big cart that can hold 10 people going at 50 mph has a greater momentum than a car the holds 4 people going at 51 mph.

# data[].attributes.body
G is the measurement of the amount of force in pounds on a moving object. When you are on a roller coaster and you are going down a hill or going upwards, when you go down a twist very fast, you might feel some weight on your chest. That weight is measured in pounds so the ride makers can adjust rides so they don't go too fast.

# data[].attributes.headline
<--------    What is Centrifugal force?  

# data[].attributes.subject
<--------    What is Centrifugal force?  

# data[].attributes.body
Centrifugal force is the opposite of Centripetal force. The object in motion goes in a spiraling path outwards. It rotates away from the center. Sometimes when you are on a roller coaster, you go in a spiral outwards. That is the same thing as centrifugal force because the coaster travels the same path.

# data[].attributes.body
Centripetal force is when an object travels in an orbiting motion, around a point of interest creating a circular path. On a roller coaster, the coaster that you are riding could go on a centripetal path for example, in a circle and then looping.

# data[].attributes.body
Acceleration is the speed, or velocity, that an object travels over time. When you are on a roller coaster, the cart that you are in might accelerate or decelerate depending on whether you are going in a loop or downwards gaining speed.