Motion 2
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TechnicalMotion equations
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Throwing & free falling1 Task
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MathematicalPythagoras' theorem
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HistoricalPythagoras of Samos
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MathematicalSquare root
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Equation rearrangement
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Equation manipulation
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Rules of algebra
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Graphs
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Linear & parabolic
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TechnicalTurning & speeding
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Circular motion1 Task
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Elliptic motion
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Centrifugal effect1 Task
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EndingSummary of the Motion discipline
Participants9
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An equation for a motion is, shall we say, not exactly visually pleasing. Just a ‘mathematical description’ or ‘recipe’ – or model – of a motion. It can give us numbers. But we can’t see it.
Let’s invent a way to “see” a mathematical description.
The motion equation $s_y=\frac{v_{y,0}s_x}{v_{x,0}}-\frac12 g \frac{s_x^2}{v_{x,0}^2}$ may look rather huge, but the only unknowns are $s_x$ and $s_y$. We already tried to plug in values for $s_x$ and then we got matching values for $s_y$. When $s_x=1\,\mathrm m$ was plugged in, $s_y=0.33\,\mathrm m$ came out. This is a point, a coordinate set $(1\,,\,0.33)\,\mathrm m$, which we can easily draw as a dot in a coordinate system:
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References:
- ‘What’s the difference between a graph, a chart, and a plot?’ (web page, forum post), Kevin Reid, English Language & Usage Stack Exchange, 2011, english.stackexchange.com/questions/43027/whats-the-difference-between-a-graph-a-chart-and-a-plot (accessed Aug. 12th, 2019)