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A roller coaster starts from rest 85m above the ground . Assume there is no energy lost when it reaches the top of the secound hill , which is 55m high. How fast is the tolerant coaster moving?

  • physics . -

    The potential energy loss equals the kinetic energy gain. The mass will cancel out and you will be left with
    g*(85 - 55) = V^2/2

    Solve for V

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