Unit 2- Kinematics: The Study of Motion

This photo represents unit 2 because in unit 2 we learned all about motion, and in this photo my friend is walking, and in motion. We learned about how all motion is relative and that motion depends on the object and what it is relative to. For example, my friend in this photo appears to be walking fast relative to me, who is standing still. Relative to a person who was walking faster than her, she would be considered slow.
 Scalars are a number that has magnitude. Ex. My friend is moving 8 meters.
Vectors have magnitude and direction. Ex. My friend's vector is that she is moving 8 meters towards the street. We learned about how vectors have displacement. Displacement is different from distance. Distance is the total length of the actual path. Her distance would be 16 meters. Displacement is change in position. For example my friend started where I was standing, and walked to where she is standing in the picture which is 8 meters away. If she came back to exactly where she started her displacement would be 0, because she would be going back to exactly where she started. To the place she is in the photo is positive  coming back to where she started is negative, so the 8 m cancel each other out and result in 0.
Instantaneous Speed- the speed you are going at any given distance. My friends speed could be 10 mph, but its the speed she is traveling at right then.
Velocity- average speed, speed with direction. I can find my friends average speed by using the formula V= distance/ time.