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9 Cards in this Set

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What is the force in simple harmonic motion
F=-kx
What is the potential energy in simple harmonic motion
PE=1/2*k*x^2 (integral of force)
what are the units of k
N/m
why is simple harmonic motion simple
the frequency does not depend on amplitude(displacement from equilibrium)
How is frequency related to k?
w=Root(k/m) WORKEM therefore
f=1/2pi*root(k/m)
what is the frequency of the pendulum
w=root(g/l) WIGGLE
f=1/2pi*root(g/L)
what are the mnemmonics for SHM?
WORKEM and WIGGLE
w=Root(k/m) w=root(g/l)
What is the spring constant k?
k is essentially how stiff the spring is higher k is more stiff so higher restoring force
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
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