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Physics Concept Map - Coggle Diagram

- - - - We see colour because objects absorb some colours and reflect others. If an object absorbs every colour except blue, it is seen as blue.
        
        Lenses can be used to correct or alter the size of images. Concave lenses converge light rays bringing images into focus. Convex lenses diverge light rays bringing images out of focus or projecting them larger than they actually are.
- - - - Velocity
      - Weight
      - Acceleration
    - - Speed
      - Time
      - Mass
  - - - Graph that displays how far an object has travelled over a period of time
        
        Speed calculated by the gradient of a line
    - - Graph that displays the direction of and how fast an object has travelled over a period of time
        
        Distance calculated by the area under the line
  - - - Calculated by dividing distance by time. Most common unit is m/s.
    - - Calculated by dividing difference in velocity divided by time. Most common unit is m/s^2 (metres per second per second).
  - - - Newton's Second Law: The change of motion of an object is proportional to the force impressed; and is made in the direction of the straight line in which the force is impressed.
        
        The force acting on an object is equal to it's mass multiplied by it's acceleration
      - Newton's Third Law: To every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts
        
        When two objects interact, they apply a force of equal magnitude to each other in opposite directions
      - Newton's First Law: Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it
        
        An object in motion will remain in motion until it is acted upon by an external force. A stationary object will remain stationary until it is acted upon by an external force.
    - - When two or more forces are acting on an object, the difference between opposite forces can be calculated to find the resultant force.
    - - The tendency of an object to continue moving in the same direction. Calculated by the mass of the object multiplied by the velocity. Most common unit is Kg m/s.
      - Conservation of momentum
        
        Work out momentum of both objects before collision. Then do total momentum/total mass to figure out velocity after collision.
    - - Stopping distance is equal to thinking distance plus braking distance
        
        Factors affecting thinking distance
        
        Age
        
        Fatigue
        
        Visibility
        
        Reaction time
        
        Drug use
        
        Distractions
        
        Factors affecting braking distance
        
        Friction
        
        Vehicle condition
- - - - In longitudinal waves vibrations are parallel to the direction of wave travel. The wavelength is calculated by the distance between two compressions (the length of a rarefaction).
        
        Sound waves
        
        Seismic P waves
    - - In transverse waves oscillations are perpendicular to the direction of wave travel. The wavelength is calculated by the distance between two crests.
        
        Seismic S waves
        
        Ripples on the surface of a liquid
        
        Electromagnetic waves