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9 Cards in this Set
- Front
- Back
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What is the force in simple harmonic motion
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F=-kx
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What is the potential energy in simple harmonic motion
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PE=1/2*k*x^2 (integral of force)
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what are the units of k
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N/m
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why is simple harmonic motion simple
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the frequency does not depend on amplitude(displacement from equilibrium)
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How is frequency related to k?
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w=Root(k/m) WORKEM therefore
f=1/2pi*root(k/m) |
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what is the frequency of the pendulum
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w=root(g/l) WIGGLE
f=1/2pi*root(g/L) |
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what are the mnemmonics for SHM?
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WORKEM and WIGGLE
w=Root(k/m) w=root(g/l) |
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What is the spring constant k?
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k is essentially how stiff the spring is higher k is more stiff so higher restoring force
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If you have a spring hanging from the ceiling of an elevator with a mass on it and the elevator is accelerating (a) How would eq. length of spring compare to eq length when not accelerating
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forces on sprin
F=T-mg and F=ma thus T=mg+ma and T=kx (if there is no mass on the spring then T must equal 0 because m=0 and x=0 x is disp from eq.) therefore x is max when a is positive which is up kx=mg+ma |
