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Pysics unit two

Speed is calculated in m/s. The eqaution for speed is speed=distance (m) divided by time (s).

Distance time graphs;

  • They show the distance an object moves in a amount of time.
  • A line that is sloping up shows the object moving away from its starting point. If it slops down, the object is moving back. 
  • The gradient (that is the slope) at any point gives the speed at that time.
  • A steeper gradient shows a faster speed.
  • A flat gradient shows the object had stopped.

Velocity and accelertation

  • Velocity is an objects speed in a given direction.
  • A change in velocity or speed is called accelertation.
  • The equation for accelertation is, acellertation (m/s squared)= change in velocity (m/s) divided by time taken (s)
  • The change in velocity is final velocity- orginal velocity.
  • A negative acceleration (decelertation) means the object slows down.

Velocity time graphs

  • Velocity time graphs show an object's velocity change with time. The gradient of the graph gives the object's acceleration.
  • A steeper gradient means greater accelertation.
  • A flat…


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