Recent content by JoeDoe

  1. J

    Minimum Force for Overcoming Friction on a Wooden Box

    Homework Statement A 20 kg wooden box is pushed a distance of 15 meters on a horizontal stone floor, by a force just sufficient to overcome the friction between the box and floor. The coefficient of kinetic energy is 0.40. What is the minimun force required? Thanks.
  2. J

    What Was the Minimum Initial Kinetic Energy of a 7 kg Shot Put Thrown 18 Meters?

    Homework Statement A 7 kg shot put is thrown 18 meters. What was its minimun intial energy? Homework Equations When θ = 45° Range = V0sin(2θ)/g Velocity = √(R * g)