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Anonymous
Anonymous asked in Science & MathematicsPhysics · 1 decade ago

Physics: How to find initial hill?

A roller coaster starts at some height that you do not know. It goes down this hill and then goes up a second hill that is 28.5 above the first drop at a speed of 22.5 m/s. So how high was the initial hill?

Please help me on this hard to do question!

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  • 1 decade ago
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    Sorry, I thought this question was about Silent Hill!

  • 1 decade ago

    if your given mass, did you try law of conservation of energy?

    1/2mv(initial)^2 + mgh(initial) = 1/2mv(final)^2 + mgh(final)

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