Ap Physics:kinematics

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efxshxam  on April 7, 2011

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Ap Physics:kinematics

 DisplacementChange in POSITION
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Displacement Change in POSITION
If acceleration is constant, then Aavg= A
v= Vi+at
x= Xi+V+1/2at^2
v^2= Vi^2=2a(x-Xi)
Position vs time graph;slope Vavg
Shortcuts for objects that start from rest and have constant a (x vs. t) 1. Vavg=Vinstantaneous
2.@ midpoint in time, 1/4 distance has bee traveled, not 1/2
3. instantaneous velocity at any point is twice average velocity from t=0 to that point
Velocity VS. Time, slope =acceleration
Given a v VS. t graph, the area between the graph and the t axis equals the object's _____ displacement
Projectile motion: @ top Vy=_ 0
Projectile Motion: Horizonontal motion Δx=Vixt
Vx=Vix=cosxi(launch angle)
Ax=0
Projectile Motion; Vertical y=Yi+Viyt-1/2gt^2
Vy=Viy-gt
Ay=-g
projectile range horizontal displacement, assuming it land at original height

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