Physics revision topic 1- Motion

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  • Created by: xavedge
  • Created on: 22-10-15 19:18
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  • Physics revision topic 1- motion
    • DISTANCE TIME GRAPHS
      • These are used to help us to describe an object in motion
      • A distance time graph shows the distance an object has moved this is shown on the Y axis (the distance from the start point)
      • The X axis shows the time taken for the object to travel the said distance
      • SPEED
        • the speed of an object is the distance travelled per secound
          • M/S
      • GRADIENT
        • the steeper the gradient the greater the speed
        • when the object is stationary the line is horizontal
        • If the object is going at a constant speed the line will be straight and it will slope upwards
    • Velocity and acceleration
      • Velocity is the speed of an object in a given direction
        • If the object changes direction it changes the velocity, even if it stays at the same speed
        • If the velocity of the object changes, it means that it accelerates
      • VELOCITY TIME GRAPHS
        • A velocity time graphs shows the velocity of the object (Y-axis) and the time taken (X-axis)
        • GRADIENT
          • The gradient of the velocity time graph shows the acceleration of the object the steeper the gradient the greater the acceleration
          • If the line on a velocity time graph is horizontal it shows that the object is going at a constant speed meaning there is no acceleration
          • If the gradient is negative this shows that the object is decelerating

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