Linear Motion

• Linear Motion

  movement of a body in a straight or curved line, where all parts move the same distance, in the same direction, over the same time

  Results From:

  a direct force being applied to a body, where the force is applied directly to a bodys CoM
• Linear Motion Descriptors

  • distance
  • displacement
  • speed
  • velocity
  • acceleration/deceleration
• Distance

  the total length covered from start to finish positions

  measure in metres (m)
• Displacement

  the shortest straight-line route from start to finish positions

  measure in metres (m)
• Speed

  the rate of change in distance

  measure in metres per second (ms-1)

  speed = distance/time taken
• Velocity

  the rate of change in displacement

  measured in metres per second (ms-1)

  velocity = displacement/time taken
• Acceleration/Deceleration

  the rate of change in velocity/the rate of change in velocity negatively

  measure in metres per second squares (ms-2)

  acceleration = (final velocity-initial velocity)/time taken
• Graphs of Linear Motion

  • distance/time graphs
  • speed/time graphs
  • velocity/time graphs
• Distance/Time Graphs

  shows the distance a body travels over a period of time

  curve indicated the speed of a body

  
• Speed/Time Graphs


  shows the speed of a body over a period of time

  curve indicates the acceleration of the body

  area under curve = distance travelled

  
• Velocity/Time Graph 


  shows the velocity of a body over a period of time

  curve indicates the acceleration of the body