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- | ====Rotation and Oscillation==== | + | =====Rotation and Oscillation===== |
+ | ====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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+ | Back to [[Physics]] page or [[00_start|Start]] page. |