Momentum

Momentum booklet revision

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  • Momentum
    • Thinking time- time taken to react by a driver
      • Thinking distance- distance the car between a hazard appearing and the driver applying the brakes.
        • Braking Time- the time taken for the car to stop after the driver has reacted to the hazard.
          • Braking distance- diistance the car travels before it comes to a halt whilst the brakes are being applied.
    • Speed and velocity
      • Average Speed= Total distance travelled/ Time taken
        • Average Speed= 100km/1.25h = 80km/h
    • Acceleration= (final velocity-initial velocity)/ time taken
      • E.G. v=12m/s u=18m/s t=3s = 12-18/ 3 = -6/3 = -2m/s2
    • Motion
      • FINAL VELOCITY= INTITAL VELOCITY + ACCELERATION TIME.
        • DISPLACEMENT= (INTIAL VELOCITY + FINAL VELOCITY) TIME/2
          • DISPLACEMENT= INITAIL VELOCITY TIME +ACCELERATION TIME2/2
            • FINAL VELOCITY2= INITIAL VELOCITY2 +2ACCELERATION DISPLACEMENT
    • Newton's Laws of Motion
      • 1. A body stays at rest or continues at constant speen unless acted upod by an unbalanced force
        • 2. Force (N)= mass(kg) x acceleration (m/s2)
    • Momentum(kgm/s) = mass(kg) x velocity (m/s)
    • Freefall= 1kg= 10N on Earth
      • Acceleration on Freefall= 10m/s2
        • Gravitational field strength =10N/kg
  • Braking distance- diistance the car travels before it comes to a halt whilst the brakes are being applied.
  • Displacement- distance from starting point
    • Momentum
      • Thinking time- time taken to react by a driver
        • Thinking distance- distance the car between a hazard appearing and the driver applying the brakes.
          • Braking Time- the time taken for the car to stop after the driver has reacted to the hazard.
        • Speed and velocity
          • Average Speed= Total distance travelled/ Time taken
            • Average Speed= 100km/1.25h = 80km/h
        • Acceleration= (final velocity-initial velocity)/ time taken
          • E.G. v=12m/s u=18m/s t=3s = 12-18/ 3 = -6/3 = -2m/s2
        • Motion
          • FINAL VELOCITY= INTITAL VELOCITY + ACCELERATION TIME.
            • DISPLACEMENT= (INTIAL VELOCITY + FINAL VELOCITY) TIME/2
              • DISPLACEMENT= INITAIL VELOCITY TIME +ACCELERATION TIME2/2
                • FINAL VELOCITY2= INITIAL VELOCITY2 +2ACCELERATION DISPLACEMENT
        • Newton's Laws of Motion
          • 1. A body stays at rest or continues at constant speen unless acted upod by an unbalanced force
            • 2. Force (N)= mass(kg) x acceleration (m/s2)
        • Momentum(kgm/s) = mass(kg) x velocity (m/s)
        • Freefall= 1kg= 10N on Earth
          • Acceleration on Freefall= 10m/s2
            • Gravitational field strength =10N/kg
      • Distance is a scalar quantity- it has size only   Displacement is a vector quantity- it has size and direction.

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