B.1.1, 1.2, 1.3 - Motion: velocity, acceleration

• Motion - a line that can change in direction/length/rate 
• Uniform motion - constant speed, straight line

  • theoretical, constant speed doesn’t really exist
• • Average speed - average speed of object over certain time 
  • Instantaneous speed - speed of object at a certain time
• Vector - when value has direction

  • ex. displacement, velocity, acceleration
• Scalar - value is only numerical

  • ex. distance
• • Distance - scalar, path between 2 points
  • Displacement - vector, SHORTEST path between 2 points
  • Change in position from initial to final
• • Speed - scalar, distance over time
  • Velocity - vector, displacement over time
• Graphs

  • position graphs: slope = velocity
  • velocity graphs: slope = acceleration
• Acceleration - vector, changing speed