b) Movement and position

b) Movement and position

1. How to plot a distance time graph

   • Time always along the bottom (t)
   • Displacement up the side (m/km) (d)
   • GRADIENT = VELOCITY
     • Distance/time=V

2. Average speed = Distance moved/Tiem taken

3. Experiment to investigate the motion of everyday objects

   • Examples: Ball rolling down tilted board. Test for how far it rolled in how many seconds.
     • Do twice and find a mean

4. Acceleration = Change in velocity/Time taken

   • a = (v - u)/t
   • change in velocity = final velocity - original velocity

5. How to plot velocity time graphs

   • Time is always along the bottom (t)
   • Speed up the side (m/s) (v)
   • GRADIENT = ACCELERATION
     • Acceleration from the gradient
       • Example (vertical axis) 20m/s & (horizontal axis) 5 seconds. SO acceleration = 20/5 = 4m/s2 (don't forget the squared)
   • AREA = DISTANCE TRAVELLED
     • v * t = d

6. Units - kg, m, m/s, m/s2, N,s, N/kg, kgm/s