physics paper 2 , p5 , forces 2

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  • forces
    • moment of a force = force x distance
      • m=fd
    • levers
      • used to increase the force applied to an object
    • gears
      • gears are used to transmit rational forces from one place to another
    • speeds
      • walking - 1.5 m/s
        • running - 3 m/s
          • cycling - 6 m/s
      • average speed = total distance travelled / time taken
    • distance travelled = speed x time
      • s = vt
    • displacement = how far an object has travelled in a straight line from the starting to finishing point

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