ch 7 simple harmonic motion

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18 Terms

1
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Hooke’s law

F = -kx

2
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Hooke’s Law for vertical motion

F = mg - kx

3
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frequency in general

f = 1/T

4
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period in general

T = 1/f = time/rev = time/# of cycles

5
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period for mass spring system

T = 2pi/w = 2pi* sqrt (m/k)

6
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frequency for mass spring system

f = 1/T = w/2pi = 1/2pi* sqrt(k/m)

7
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angular frequency

w = sqrt(k/m)

8
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max velocity

Aw = A*sqrt(k/m)

9
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max acceleration

Aw²

10
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restoring force for pendulum

Fx = mg sin(theta)

x component

11
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period for pendulum

T = 2pi * sqrt(L/g)

12
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frequency for pendulum

T = 1/2pi * sqrt(g/L)

13
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elastic potential energy of spring

U = 1/2kx²

14
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kinetic energy of simple harmonic motion

KE = 1/2mv²

15
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total mechanical energy

ME = KE + U = 1/2mv² + 1/2kx²

16
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total mechanical energy at maximum displacement

ME = KE + U = 0 + 1/2kx² = 1/2kA²

17
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total mechanical energy at equilibrium

ME = KE + U = 1/2mv² + 0 = 1/2mv_max²

18
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total mechanical energy between max displacement and equilibrium

ME = KE + U = 1/2mv² + 1/2kx²