Motion

• It is the change of position.

  Motion
• It is always described in relation to a reference point

  Relative Motion
• If you’re standing by a road and a truck drives by at 30 miles per hour, to you, the truck appears to be moving 30 miles per hour down the road. However, if you were in a car also driving 30 miles per hour next to the truck, the same truck wouldn’t seem to move.

  Example of Relative Motion
• It is the distance something travels in a certain amount of time:

  Speed
• Formula of Speed:


  = Distance over time
• Speed is measured in?

  m/s
• It is the total distance something has traveled divided by the total time it has traveled

  Average speed
• is the speed at a certain given moment.


  Instantaneous Speed
• It is the speed in a certain direction.

  Velocity
• A change in velocity means either a change in DIRECTION or a change in SPEED. 


  True
• It is the change in velocity over change in time

  Acceleration
• It is measured in m/s squared

  Acceleration
• Something can accelerate by:

  SPEEDING UP, SLOWING DOWN, or

  CHANGING DIRECTION.
• What is the formula of acceleration?


  = Final velocity - Initial velocity over time
• Acceleration is positive when it is in the same direction as the object ’s motion, and positive acceleration means the object is speeding up.


  True
• Acceleration is negative when it is in the opposite direction of the object ’s motion, and it means the object is slowing down. 


  True
• Negative acceleration can also be

  called

  Deceleration