Kinematics

• A vector is a physical quantity that has both magnitude and

  direction.
• A scalar quantity is a physical quantity that has magnitude only.
• a resultant vector is the single vector which has the same effect as the original vectors acting together.
• Distance is the length of path travelled.
• Displacement is a change in position.
• Position is a vector quantity that points from the reference point as the origin.
• Speed

  the rate of change of distance
• Velocity

  The rate of change of position
• Acceleration

  The rate of change of velocity