Recent content by college-kid

  1. C

    Conservation of Energy in Gravity

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  2. C

    Conservation of Energy in Gravity

    Homework Statement A boy at the top of a roller coaster falls through a vertical distance of 20m. What is the final speed of the boy if: a) His initial speed was 0 b) His initial speed was 5 ms-1 Homework Equations GPE at top = KE at bottom mgh = 1/2mv^2 gh = 1/2v^2 v = √2gh if...