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Reading Motion from Graphs

Given a velocity graph v(t):

Where v > 0: particle moves right/up

Where v < 0: particle moves left/down

Where v = 0: particle momentarily stops

Where v changes sign: particle changes direction


Displacement = net area under v(t).

Area above x-axis is positive. Area below is negative.


Total distance = total area (all areas counted as positive).


Given an acceleration graph a(t):

Where a > 0 and v > 0: speeding up

Where a > 0 and v < 0: slowing down

Where a < 0 and v > 0: slowing down

Where a < 0 and v < 0: speeding up


AP exam: Graph-based motion questions are common. Practice reading all three graphs (s, v, a) and translating between them.


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AP Calculus: Rectilinear Motion with Graphs
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AP Calculus: Rectilinear Motion with Graphs
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Reference:

Wikipedia: Kinematics

image for linkhttps://en.wikipedia.org/wiki/Kinematics

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