Physics

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  • Physics
    • Stopping distance
      • breaking distance
        • the distance it takes from the breaks being applied to the car coming to a halt
        • the breaking distance is increased the faster the vehicle is moving or the heavier its mass
        • for the vehicle to slow a force needs to be applied in the opposite direction, for it to stop the momentum must equal zero
        • rate of change in momentum               =            force  applied
        • can be affected by: the road surface e.g icy conditions or wet road, or the surfce of the tires
    • work done
      • measured in Joules
      • work done = force applied x how far you traveled in the direction of the force
    • Elastic potential energy
      • is converted to kinetic energy
      • a more resistant 'stiffer' spring that is stretched the same amount as a looser string with have a greater epe
      • the amount of energy in an object that is required for it to return to its natural shape once it has been re-shaped
      • a material has elastic properties if when a force is applied it canges shape butit can revert back to its old shape, if it does not it has plastic properties
    • Hookes law
      • experiment with ruler, clampstand and weights on a sring
      • on a graph the elastic potential energy is directly proportional to the force applied
      • eventually the object will reach its elastic limit and can no longer return to its original shapre
    • Accelleration
      • speed is how far you go in any direction in a certain amount of time
        • Velogicty is how far you go in a certain direction in a certain amount of time
        • Accelleration is rate of change in velocity
    • forces
      • mass is the amount of product there is and it stays the same wherever you are
      • weight is the downward gravitational force acting on an object measured n Newtons
    • Ohms Law
      • v=IxR
    • Stars
      • Nebula
        • Prostar
          • Main Sqquence star
            • Red Giant
            • Red Super Giant
              • Supernova
                • Black Hole
                • Neutron
  • Elastic potential energy
    • is converted to kinetic energy
    • a more resistant 'stiffer' spring that is stretched the same amount as a looser string with have a greater epe
    • the amount of energy in an object that is required for it to return to its natural shape once it has been re-shaped
    • a material has elastic properties if when a force is applied it canges shape butit can revert back to its old shape, if it does not it has plastic properties

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