Recent content by genPhysics

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    Work Problem: Climbing 3000m Mountain with 50kg Woman

    Homework Statement A 50kg woman climbs a 3000m mountain high. a) how much work does she do against the gravitational forces? b) a kilogram of fat supplies 3.8 x 10^7 J of energy. If she converts fat into mechanical energy with a 20% efficiency rate, how much fat will she consume in the...
  2. G

    Gravitational Potential Energy of a rocket fired straight up

    Homework Statement A rocket is fired straight up from the surface of the Earth at half the escape velocity. How high will it go relative to the surface of the earth? Neglect dissipative forces. Homework Equations Uinitial + Kinitial = Uf Kf is zero G*m*M/radius^2 + 1/2mv^2 =...