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Uniform Motion and Graphing

Uniform Motion and Graphing. Uniform motion – objects travel equal displacements in equal amounts of time.

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Uniform Motion and Graphing

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  1. Uniform Motion and Graphing Uniform motion – objects travel equal displacements in equal amounts of time. Ex. Think of Ice skating, when you push off the boards, you would glide across the ice and then eventually stop because of the friction between the ice and your skate blades. But if it was uniform motion, when you pushed off the boards, you would never stop!

  2. Say you roll a pool ball across a table… you can show it in a motion diagram

  3. Another way to show position and time is in a Position-Time graph Best fit line (straight line or smooth curve that fits the shape of graph)

  4. Slope!! • Slopeis the steepness of a line (whether it goes up or down at an angle, or is horizontal) – think of house roofs… you could have really steep roofs (to shed lots of snow), or flat roofs(in hot countries where there is no snow) • The steep roofs have a high slope, whereas the flat roofs have no slope (0 slope).

  5. Positive Slope • The line slants up to the right. • Picture a little stick man walking along the line – he’d be walking uphill (positive) • What does it mean?

  6. Positive slope – Tiger Woods style • If the ball is hit directly from the tee to the hole and goes in – the slope is positive – there is no backtracking back to the hole.

  7. Negative Slope • The line slants down to the right. • Picture a little stick man walking along the line – he’d be walking downhill (negative) • What does it mean (golfing)?

  8. Negative slope – Tiger Woods style • Tiger shoots the ball past the hole and then has to hit the ball back to the hole – going in a negative direction – so the slope of the line is going down – negative slope

  9. Zero Slope • The line is horizontal. • There is no steepness to the line –so it’s a slope of nothing –zero! • What does it mean?

  10. Zero slope – Tiger Woods style • The ball is still on the tee and has not moved yet so… the position is zero as time goes on and so the slope is 0.

  11. Activity 8-1D (Pg. 355 in textbook) • You don’t need to sketch the graphs – just use the graphs to answer questions # 2,3,4,5,and 7 on a clean sheet of loose-leaf paper.

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