Distance measures the length of the path travelled straight line distance reference point change in position( length of the path travelled, straight line distance, reference point, change in position ). Position is the straight line distance length of the path travelled reference point change in position( straight line distance, length of the path travelled, reference point, change in position ) between an object and a reference point straight line distance length of the path travelled change in position( reference point, straight line distance, length of the path travelled, change in position ). Displacement gives us the change in position reference point straight line distance length of the path travelled( change in position, reference point, straight line distance, length of the path travelled ) of an object from a reference point.