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PHy ch2 summary

# PHy ch2 summary - Chapter 2 Kinematics The mathematics of...

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Chapter 2 Kinematics: The mathematics of Motion This denotes positive and negative values on a graph. Interpreting position/time graphs When the values are positive they indicate distance to the right of the origin When the values are negative they indicate distance to the left of the origin When the values are zero they indicate the object is at the origin When the we have a flat line (slope = 0) this indicate the objects position with respect to origin is not changing hence it is stationary The slope of a position/time graph indicates velocity at that point. A straight line indicates constant/uniform velocity as from t (min) from 0-30 we see that the slope of that line is the velocity from t=0-30 (there will be a flat line on the v/t graph) motion) (uniform run rise t v s s t t s s t s v s i f i f i f s + = - - = = =

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t 0 (instantaneous velocity) lim s s ds v t dt ∆ → = To find the instantaneous velocity at a time (t) we take the limit as change in t approaches zero. For the s/t graph As we zoom in the curve becomes a line and the instantaneous velocity is found.
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PHy ch2 summary - Chapter 2 Kinematics The mathematics of...

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