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End_semester_review

# End_semester_review - Physics 214 Problems This document is...

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12/09/11 Physics 214 Fall 2010 1 Physics 214 Problems This document is a set of sample problems from Chapters 2 – 19 and is intended to be a guide in preparing for the final exam Final exam Monday Dec 12 th 7 - 9pm Phys 114

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12/09/11 Physics 214 Fall 2010 2 Avge/instantaneous Speed/velocity Constant acceleration Gravity/Projectiles Vectors Forces Circular motion Gravitation Making a trip Quarter mile drag race Vertical with gravity Horizontal velocity is constant. Acceleration is always g down Simple force diagrams Apparent weight Horizontal circle Car around corner Ferris wheel Force between two masses Planets s = d/t v = v 0 + at x = x 0 + v 0 t + 1/2at 2 v 2 = v 0 2 + 2ax F = ma F = mv 2 /r F = Gm 1 m 2 /r 2 Gm 1 m 2 /r 2 = mv 2 /r Velocity Acceleration Force momentum
12/09/11 Physics 214 Fall 2010 3 Energy Work Power Momentum Impulse Rotation Constant angular accn Torque Kinetic energy Angular momentum K E = 1/2mv 2 PE =mgh or 1/2kx 2 W = Fd Power = P = W/t P = mv FΔt = Δp ω = ω 0 + αt θ = ω 0 t + 1/2αt 2 Τ = Fl = I α 1/2 I ω 2 L = I ω Conservation of energy Sled sliding down a hill Work can be negative Motors, lifting something Cons of momentum Two objects collide Two objects separate Circle = 2π Counterclock is + Wrench Cons of ang mom Skater, changing I

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12/09/11 Physics 214 Fall 2010 4 P = F/A F 1 /A 1 = F 2 /A 2 1.013 10 5 Pa 76cm Hg F = PA m = ρV w = ρVg P = W/A = ρgh Pressure Hydraulic jack Atmospheric pressure Suction cup Density ρ = mass/unit volume Pressure difference Transmitted equally in all directions in a liquid Pressure reduces with altitude Maximum weight to lift PA = mg Object floats if it’s density is less than that of the liquid h is the difference in height between two points in a liquid
12/09/11 Physics 214 Fall 2010 5 Archimedes Buoyant force Force and electric field g T mg F b T + F b = mg F b = ρgV Buoyant force is the weight of liquid displaced The force a charge feels is qE. E is in the direction a + charge would move Voltage between two points is the change in potential energy/unit charge Toward a + charge, (against E) voltage increases

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12/09/11 Physics 214 Fall 2010 6 ΔV = ΔPE/q I = q/t R = ΔV/I I = ε/(R circuit + R battery ) P = εI = I 2 R = ε 2 /R P = VI = I 2 R = V 2 /R R = R 1 + R 2 + R 3 1/R = 1/R 1 +1/R 2 +1/R 3 Current, voltage, charge and resistance Circuits ε is the electromotive force or the voltage across a battery when no current is being drawn. V or ΔV is the voltage drop between two points in a circuit with current I Series Parallel If a charge plus q goes to a lower voltage energy qV is released Ohms law Power dissipated Current is the same in all parts of the circuit Voltage drop is the same across all resistors
12/09/11 Physics 214 Fall 2010 7 By definition the field lines enter a south pole and leave a north pole maximum force is when v is at right angles to B and the force is zero if v is parallel to B or v = 0.

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End_semester_review - Physics 214 Problems This document is...

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