The author describes what potential energy is and explains how roller coasters use potential energy as they rise to the top of the hill. She then explains kinetic energy, what it is, and how a roller coaster is using it when it comes down the hill. Later, Kibler described how the coaster will run out of kinetic energy. Even without brakes, she says, friction would cause it to eventually come to a stop. This all supports Kibler's argument that science can be learned from amusement park rides.
<span>The answer to this question is A-30. This depends on the type of athlete, however, the majority of athletes require 30% of their daily calories to come from fat. This should be healthy fats that can be broken down by the body easily, such as the polyunsaturated fats that can be found in fish.</span>