show that the sum of potential energy and kinetic energy remains the same by giving the example of rollercoaster car
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A roller coaster operates on the law of conservation of energy. Initially, some work is done to put the roller coaster car at the top position. This work done is stored in the roller coaster car in the form of potential energy. But it's kinetic energy is zero due to its stationary position
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energy which a body possesses by virtue of being in motion.
energy above that needed to ionize the molecule is carried away as kinetic energy of the electron ejected
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