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A roller coaster car with a mass of 640kg moved along a section in track. Assume all friction is negligible. A) If the roller coaster

A roller coaster car with a mass of 640kg moved along a section in track. Assume all friction is negligible. A) If the roller coaster starts from rest point A, calculate the speed of the roller coaster car when it reaches point B B) if the roller coaster car starts with an initial speed of 12 m/s at point A, calculate the speed of the roller coaster when it reaches point C

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