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Chapter 3 : Motion (Acceleration (Velocity-time graphs (Gradient =…

- - - - Then determine the gradient of tangent
      - Greater the gradient, greater the instantaneous speed
- - - - The distance travelled between the moment when you first see a reason to stop, to the moment when you use the brake
      - thinking distance = speed * reaction time
    - - The distance travelled from the time the brake is applied until the vehicle stops
- - - - Drop a heavy ball over a known distance and time its descent
        
        Happens very quickly so not very accurate
      - Electromagnet and trapdoor
        
        An electromagnet holds a small steel ball above a trapdoor
        
        When the current is switched off, a timer is triggered and the electromagnet demagnetises, and the ball falls
        
        When it hits the trapdoor, the electircal contact is broken and the timer stops
        
        The value for g is calculated from the height of the free fall and the time taken