Velocity vs. time graphs

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Presentation transcript:

Velocity vs. time graphs

Ticker tape models

Constant velocity versus changing velocity

Changing velocity

Positive velocity

What does the graph reveal The slope of the line on a v/t graph reveals useful information about the acceleration of the object. If a is 0 than the slope is 0 (horizontal line) If a is + than the slope is +

Positive and negative velocity

Speeding up and slowing down

Meaning of the slope In a time vs velocity graph the slope of the line = the acceleration of the object. Analyze and calculate the motion of each stage of movement in this graph.

answers First stage is +40m/s/s Second stage is +20m/s/s Third stage is -20m/s/s

Area on a vt graph The area bound by the line and the axes represents the displacement of the object being measured. Shape area review Rectangle: Area = b*h Triangle: Area = ½ * b*h Trapezoid: Area = ½ * b * (h1 + h2)