Physics

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  Distance is a scalar quantity
• There is always a distance covered whenever there is a motion
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  Distance is The length of the path travelled by a body while moving from an initial position to a final position
• The total distance covered is equal to the algebraic sum of all the distances travelled in different directions
• Distance measured

  Is always positive
• Unit metre


  The standard unit used to measure length in the metric system
• Zero displacement


  The body comes back to its initial position
• Vector quantity

  A quantity having both magnitude and direction
• Magnitude


  The size or amount of a quantity
• Displacement


  The shortest distance between the initial position and the final position of the body
• Net displacement


  The vector sum of the individual displacements in different directions
• Displacement


  • Displacement is a vector quantity
  • Displacement can be positive or negative depending on the reference point
  • Displacement will be zero if the body comes back to its initial position
• Speed can never be negative, it is always positive or zero
• Acceleration

  • It is a scalar quantity
• Acceleration

  The rate of change of velocity
• Speed


  May or may not be equal to velocity, depending on whether the direction changes or not
• Velocity


  Speed with direction
• Velocity

  Vector quantity
• Speed


  Magnitude of velocity
• Can be 0, positive or negative
• A body may possess different velocities at the same time
• Velocity is directed
• Velocity


  The rate of change of displacement