roller coasters
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Title: roller coasters

Essay Details:

Subject: Science
Author: Ian S
Date: September 19, 2010
Level: University
Grade: A
Length: 23 / 6897

Essay text:

The car is pulled to the top of the first hill at the beginning of the ride, but after that the coaster must complete the ride on its own. You aren't being propelled around the track by a motor or pulled by a hitch. The conversion of potential energy to kinetic energy is what drives the roller coaster, and all of the kinetic energy you need for the ride is present once the coaster descends the first hill.. Once you're underway, different types of wheels help keep the ride smooth. Running wheels guide the coaster on the track. Friction wheels control lateral motion (movement to either side of the track)...

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