Saturday, January 13, 2018

Scalar and Vectors

http://ak2.picdn.net/shutterstock/videos/10588442/thumb/1.jpg
Summary: Motion. What we know motion to be is an object moving from one place to another. Yet motion is not as simple as that once you look at how to track motion. For example lets say we have a person. To properly record this person movement we must first find a reference point. A reference point is a fixed point that never moves where you can observe motion from. So lets say out reference point is a tree in the middle of the field this person is standing in. Now the person is 5 feet away from the tree. This information would be considered a scalar. Scalars are just numbers that defines the magnitude of an object. Scalars unlike a Vector tells you nothing about what direction the person is headed in. To truly determine which position the person is we need a Vector quantity. With a vector quantity it will tell us the magnitude in this case 5 feet and it will tell us the direction that magnitude is directed in. So lets say the person is 5 feet north of the tree. Now we know if were to put this on a graph the person stands at point 5 feet in the northern direction which would be up on the y axis.

 S&EP: Using Mathematics:
 When determining the movement of something we can not expect them to always go in straight lines. We walk in lines of diagonal to get the shortest distance from point A to point B. There is actually a name for this which is displacement. Displacement is a Vector Quantity because you must with displacement say the direction . Yet since it is a diagonal we must use a little mathmatic to find our way. First off do you know rise over run. Let me explain. Rise is how high or how low the line went up. Then you must find the run which is how far that line is extended too. Then finally with both of those numbers you put the rise over run to get the slope aka our displacement!
http://mathandmultimedia.com/wp-content/uploads/2012/06/slope-1.png
XCC: Stability and Change:
When an object changes its position relative to the reference point it can do it in one of two ways. It can do it a consistent rate of change. This means the velocity changes at an equal amount making it so it does not accelerate and still stays an even ratio. This will make a straight line slop it does not need to curve because everything is consistent and goes at the same rate the entire time it moves.Or it can change at a non consistent rate where the time and the speed begin to differ from one another.  This would be like you walking at one point and then running at another. This would create a curved slope. Changes effect our graph in many ways but this is how a change in velocity will change it.

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