As Mechanics

As Mechanics

1. Velocity and acceleration

   • Rate of movement
     • Velocity (ms-1)=Displacement (m) / Time (t)
       • This can also be shown as the simpler as Speed=distance/time
       • Velocity is the the speed of an object but with a direction
         • Displacement is the distance but with a direction
         • These are known as Vector Quantities
   • Average and instantaneous speed
     • Average speed is calculated by dividing the total distance by total time
     • To get instantaneous speed you draw a tangent onto a displacement time graph
       • Example of tangent
       • You work out the gradient to get the speed. Using the change in X/ Change in Y
         • Delta X/Delta Y  Draw delta using a triangle before the letter
   • Acceleration
     • Is defined by the rate of change in velocity
     • Acceleration (ms-2)= Change in velocity (ms-1)/time taken for velocity to change (s)

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