Physics- Movement and Position

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  • Movement & Position
    • V= D/T
      • V= velocity or speed
      • D= distance travelled
      • T= Time taken
    • The distance travelled is measured in metres and time taken in seconds
      • This means speed is measured in METRES PER SECOND (m/s)
    • The speed equation can also be rearranged to give two other useful equations.
      • Distance Travelled=     D= V X T
      • Time Taken =     T= D/V
    • Distance time graphs tell us how the car is travelling depending on its slope
      • if it is sloping up to the right this shows a constant or a steady speed
        • If the graph is sloping down to the right this is called a NEGATIVE GRADIENT
    • Acceleration
      • Equation
        • Acceleration= Change in velocity/Time taken
          • or                   final velocity - initial velocity/ time taken.
            • a= (v-u)/t
    • Velocity
      • Speed in a particular direction
        • For example if a car is travelling at 50 km/h around a bend its speed is constant but its velocity will be changing as long as that the direction that the car is travelling in is changing
    • Deceleration
      • means slowing down
        • this means the decelerating object will have a smaller final velocity than its starting velocity
          • E.G if you used the equation for finding the acceleration of an object that is slowing down the answer will have a negative sign.
            • a negative sign simply means deceleration



Hi I just want to let you know that the equations I've had to do a bit differently because my computer would not allow me to add in division signs etc. so / is representing a division sign :) 

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