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9 Cards in this Set
- Front
- Back
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Center of Mass
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X = m1x1 + m2x2 / m1 + m2
- Geometric center of an object - If stick has a mass, you must add it to the numerator (mx) and to the denominator (x) |
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Center of Gravity
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X = w1x1 + w2x2 / w1 + w2
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Uniform Circular Motion
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a = v²/r
- Experiences UCM if the speed is constant (velocity isn't constant) - a ⟘ v - a and Fnet always same direction - v always tangent to center - make sure TOWARD center always (+) |
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Torque
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T = rFsinϴ
- Torque is a measurement of a force's effectiveness of making an object rotate on its center of mass - Not a force, property of a force |
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Torque
(Lever Arm) |
T = LF
- Lever arm is the ⟘ distance from the axis of rotation to the line of the force |
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Equilibrium of Torques
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Tc = Tccw
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Equilibrium (2)
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- Zero Acceleration
- Two types to describe forces/torques: translational (Fnet) and rotational (Tnet) |
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Static Equilibrium
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- Velocity and acceleration are zero
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Rotational Inertia
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Tnet = Iα
- Measures an object's resistance to rotational acceleration - The smaller the moment of inertia, the greater the rotational acceleration |
