# L37 - Remember:ThisWeek CAPA assignment#13 is due Friday...

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Remember: This Week CAPA assignment #13 is due Friday evening at 10 PM, to be done on-line. Recitation 6: Rotation, Rigid Body Motion, & Harmonic Motion Read Ch. 10: Fluids. Ch. 10.1-10.10. Also fnish Ch. 9.1-9.4. Video on angular momentum: h.p://www±ny5mes±com/interac5ve/sports/olympics/olympics‐interac5ves±html#tab1 L37 W 4/14/10 1 Physics 2010

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L38 W 4/17/09 Physics 2010 2 Fluids Density: ρ = M / V kg / m 3 H 2 O = 10 3 kg / m 3 air = 1.29 kg / m 3 Pressure: P = F / A Pa = N / m 2 1 bar = 10 5 Pa 1 atm 14.7 psi P = gh Today Today – two important principles in ±uid dynamics related to forces: Pascal’s Principle Archimedes’ Principle -- bouyancy
L37 W 4/14/10 Physics 2010 3 Fluids Pascal’s Principle: If an exernal pressure is applied to a con±ned ²uid, the pressure at every point within the ²uid increases by that amount. P OUT = P IN F OUT A OUT = F IN A IN F OUT = A OUT A IN F IN hydraulic lift

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L37 W 4/14/10 Physics 2010 4 F OUT = A OUT A IN F IN A force of 200 lbs is applied as F IN . Assume that A IN is 1 cm 2 and A OUT is 20 cm 2 .
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L37 - Remember:ThisWeek CAPA assignment#13 is due Friday...

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