vectors and scalars

• Scalar


  A physical quantity that only has magnitude
• Vector


  A physical quantity that has direction and magnitude
• Weight


  is a measure of how much matter of particles an object has
• Mass


  is a measure of how strongly gravity puts on that matter
• Velocity


  The speed of an object in a particular direction. Usually measured in meters (m) in meters per second (m/s).
• Velocity is a vector
• Speed

  A measure of the distance an object travels in a given time. Often measured in meters (m) in meters per second (m/s), miles per hour (mph) or kilometres per hour (kmph)
• Speed is a scalar quantity
• Displacement


  The distance travelled in a particular direction.
• Displacement is a vector
• Distance


  How far something has travelled
• Distance is a scalar
• Acceleration


  rate at which velocity changes with time, in terms of both speed and direction
• Force


  The push or pull on an object with mass causes it to change its velocity
• Momentum


  a measurement of mass in motion
• Energy


  being in different 'stores'. It cannot be created or destroyed but it can be transferred, dissipated or stored in different ways