Physics Cheat Sheet #3 - o V V at = + 2 1 2 o X V t at = +...

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Unformatted text preview: o V V at = + 2 1 2 o X V t at = + 2 2 2 f o V V a X = + 2 c v a r = v w r = rF = (sin ) rF = sin d r = (Lever Arm) I = a r = L t = 2 1 2 r KE Iw = 2 ( ) Inertia I mr = 2 : Hoop I mr = . ( ) Angular Momentum L Iw = i i f f I w I w = 1 1 2 2 1 2 ... ... cg m x m x X m m + = + i i i m x m = i i cg i m y Y m = 2 1 : 2 Disc I mr = 2 s r = 2 360 = o s r = 2 1 dim av w ensions t t = 1 dim av W ensions t t = = Torque: magnitude, position, angle---Forces cause accelerations; torques cause angular accelerations. Distance is perpendicular. Torque: the value depends on the chosen axis of rotation. Clockwise= positive Counterclockwise= negative Mechanical Equilibrium: net external force (translational) and net external torque (rotational) must be zero....
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