GCSE Physics

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Author:
ghoran
ID:
182892
Filename:
GCSE Physics
Updated:
2012-11-17 05:20:54
Tags:
Unit two point one
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  1. Speed and velocity are both a measure of 
    how fast you are going 
  2. speedAll speed and velocity are both measured in 
    m/s
  3. speed is
    How fast you are going with regard to direction
  4. Velocity however
    Is a measure of how fast you are you going , however it must also have the direction specified
  5. Label the graph frbot left to right on the top and then left to right on the bottom 
    • Stopped 
    • decelerating 
    • steady speed 
    • accelerating 
    • steady speed (in other direction)
  6. speed =
    • Distance 
    • -----------
    • time 
  7. On a distance time graph what does the gradient show us
    How fast the object is travelling . This is because the gradient is the change in distance (vertical axis) divided by the change in time (horizontal axis)
  8. on a distance time graph the gradient = 
    Speed 
  9. On a distance time graph flat sections are where the object is 
    Stationary 
  10. On a distance time graph straight uphill or downhill means 
    It's travelling at a steady speed 
  11. On a distance time graph downhill sections means
    It's going back to starting points 
  12. On a distance time graph curves
    Represent acceleration or deceleration 
  13. On a distance time graph a steeping curve means its 
    Speeding up 
  14. On a distance time graph a levelling off curve means its 
    slowing down
  15. Acceleration is 
    • How quickly velocity is changing 
    • this change in velocity can be a change in speed or change in direction or both 
  16. what is the formula for acceleration
    • Change in velocity
    • -----------------------
    • time taken 

    or 

    • (v - u) 
    • ---------- 
    •  t 
    • here v is tye final velocity and u is the initial velocity
  17. What are the units of acceleration
    • m/s ^2
    • acceleartion is the change inn velocity (m/s) per second (s)
  18. A skulling cat accelerates from 2m/s to 6m/s in 5.6s find its acceleration
    A = (v-u) / t
  19. Label the graph from left to right on the top and then left to right on the bottom 
    • Steady speed 
    • steady speed 
    • acceleation 
    • increasing acceleration
    • dece

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