Ch8_GreensteinJ

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 * =Notes 3/27=
 * [[image:http://www.pascack.k12.nj.us/cms/lib5/NJ01000238/Centricity/Domain/86/Screen%20shot%202012-03-27%20at%2012.07.02%20PM.png width="874" height="492" caption="http://www.pascack.k12.nj.us/cms/lib5/NJ01000238/Centricity/Domain/86/Screen%20shot%202012-03-27%20at%2012.07.02%20PM.png"]]

=Notes 4/10=
 * Torque
 * T = f*r sin θ
 * r = distance from fulcrum to force
 * Lever or moment arm
 * f = force
 * θ= angle between f and r
 * Not measured in joules!
 * Either pulling clockwise or counter clockwise
 * Clockwise is negative (-)
 * Counterclockwise is positive (+)
 * Pivot point
 * fulcrum
 * Balance
 * When clockwise force equals counter clockwise force

=Notes 4/11=
 * Center of mass
 * Center of the mass
 * Center of gravity
 * Depends on gravity (distance from Earth)
 * Translational
 * Displacement
 * d
 * rθ
 * Velocity
 * v
 * rω
 * Acceleration
 * ax
 * rα
 * Rotational
 * Angular displacement
 * θ
 * Angular velocity
 * ω
 * Angular acceleration
 * α
 * Newton's 2nd law
 * F=ma
 * T = I α
 * P=mv
 * L = I ω

=Notes 4/12=
 * Torque
 * Force that causes rotation
 * Beam
 * Lever arm
 * Moment arm
 * Conditions for equilibrium
 * No translational motion
 * Net force = 0
 * Fx = 0
 * Fy = 0
 * No rotational motion
 * T = 0

=Notes 4/16=
 * Rotational Inertia
 * Inertia
 * An object's resistance to changes in motion
 * Rotational Inertia
 * An object's resistance to changes in rotational motion
 * Spinning
 * Rolling
 * Distribution of mass matters
 * Closer to the axis of rotation, less inertia
 * Farther from the axis of rotation, more inertia
 * I = Σmr^2
 * Rotational Kinetic Emnergy
 * KErot = 1/2 *I*ω^2
 * Angular Momentum
 * L = I*ω
 * Law of conservation of angular momentum
 * Iiωi = If *ωf