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Unformatted text preview: ∆ t > 0 , ∆ x gives sign of v , and ∆ v gives sign of a positive(to right) negative(to left) About speed • average speed ( ≠ ave v) is total distance traveled divided by total time interval • speed is the magnitude of the velocity, ∴ speed ≥ 0 About graphs • Velocity is the slope of the x vs t graph, it is either the slope of a line segment connecting two points on the graph or the slope of the tangent line to the graph. • Acceleration is the slope of the v vs t graph, it is either the slope of a line segment connecting two points on the graph or the slope of the tangent line to the graph. EXAMPLES [in class]...
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 Spring '08
 Chen
 Physics, Acceleration, Velocity, v≡ dx/dt

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