Mr. Cresswell asked his class to watch a video and make a prediction of what the graphs would look like, then record the time and distance and create an 'actual' graph. My first two prediction graphs were somewhat close to the actual graphs but my last graph was really off. My graphs was different from the actual graphs because I was unsure of how fast or slow the skateboard was moving. My graphs just weren't steep enough. My reasoning for my prediction graphs was that if the skateboard was going fast there was a steep line and if the skateboard was going slow then it was a more gradual line, when the skateboard reached the point where it went backwards I made the line go down showing the that it was moving back to the previous distances.
The zeros of my graphs are either where the skateboard began or where the skateboard has gone back to the beginning. Each of my graphs only have one zero which is the origin. The maximums of the graph are each different, the 21 inch ramp graph shows that it has the highest maximum and then the 14 inch has less and the seven inch is even less. Each of the maximums are between 10 and 15 seconds. I believe that with the difference in the height of the ramps made it so the graphs have different maximums, with the highest ramp you get the highest maximum and with a lower ramp you a lower maximum. For the first two graphs the slope is rising the fastest at the beginning and the falling the fastest when it first starts to go backwards. The third graph also rises the fastest at the beginning but it does not fall, it stops. The slope is rising the fastest at the beginning because that is when the skateboard is moving the fastest, the skateboard has not had numerous amounts of friction to slow it down yet. It falls the fastest after it moves backwards because it is beginning again and has not had the friction to slow it down.
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November 2017
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