Physics Cheat Sheet #3

# 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 τ = (sin ) rF τ θ = sin d r θ = (Lever Arm) I τ α = a r α = L t τ ∆ ∑ = ∆ 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 π = 2 360 π = o s r θ = 2 1 dim av w ensions t t α ∆ = ∆ 1 dim av W ensions t t θ ∆ = = ∆ 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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