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urp:physrot
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| - | =====Rotation and Oscillation===== | + | =====Rotation===== |
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| - | ====Spring and Lever==== | + | |
| - | **Hooke's law** for springs: F=-kx, k=spring constant, x = displacement | + | |
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| - | **Fulcrum**: t = r * f (torque = radius * force) | + | |
| - | just add the torques for multiple objects on one side of a fulcrum | + | |
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| - | ====SHM - Simple Harmonic Motion==== | + | |
| - | F = ma, ∴ ma = -kx | + | |
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| - | angular frequency ω = √(k/m) | + | |
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| - | period of oscillation T = 2π √(m/k) (horizontal or vertical springs) | + | |
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| - | In a vertical spring, the weight Mg of the body produces an initial elongation to equilibrium, such that Mg − kyₒ = 0. | + | |
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| - | If y is the displacement from this equilibrium position the total restoring force will be Mg − k(yₒ + y) = −ky | + | |
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urp/physrot.txt · Last modified: 2021-11-08 by nerf_herder
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