# Shared Flashcard Set

## Details

Rialto High AP Physics B Flashcards
Bacon's AP Physics B Flashcards
35
Physics
11/16/2011

Term
 Dx = vavgt
Definition
 Steady motion: relates distance and time
Term
 v = v0 + at
Definition
 Accelerated motion: relates velocity as a function of time
Term
 Dx = v0t + ½ at2
Definition
 Accelerated motion: relates displacement as a function of time
Term
Definition
 Accelerated motion: relates velocity to displacement (no information on time)
Term
 Fnet  = ma
Definition
 Relates acceleration to the amount of unbalanced force ("net force")
Term
 W = mg
Definition
 Weight, how hard gravity pulls down on an object
Term
 downhill F = mgsinq
Definition
 How hard gravity pulls downhill along an incline (btw, what is the similar equation for inclined normal force?)
Term
 Fgrav = Gm1m2/d2
Definition
 Universal Gravitation: how hard two masses pull on each other
Term
 Ffriction = mFN
Definition
 Amount of friction force is coefficent of fricton times normal force
Term
 Felastic = kDx
Definition
 Elastic force is "spring constant" multiplied by amount of stretch or compression
Term
 a = v2/r
Definition
 Motion along a circular (or curved) path requires unbalaned force; this is the amount of acceleration
Term
 V = 2pr/T
Definition
 Relates the speed around a circle to the circumference and the period
Term
 F = mv2/r (just F =ma for a curve)
Definition
 Amount of ofrce needed to keep an object moving with speed "v" on a circular path of radius "r"
Term
 W = FDx
Definition
 Amount of energy gained/lost because a force acted on you ("work")
Term
 KE = ½ mv2
Definition
 Amount of energy possessed by a moving object ("kinetic energy")
Term
 PEgrav = mgh
Definition
 Amount of potential energy possessed by an object due to its elevation (gravitation PE)
Term
 PEelastic = ½ kx2
Definition
 Amount of potential energy possessed by an elastic system that is stretched/compressed
Term
 FDx = ½ mv2, ½ k(Dx)2 = ½ mv2, etc
Definition
 Conservation of energy; a form of energy at the beginning can change to a different form at the end
Term
 P = energy/time
Definition
 General definition o fpower (energy rate). Depending on situation it can be Ed/t mah/t or mv2/2t or mCDT/t etc.
Term
 P = Fv
Definition
 Power for a specific situation: energy rate required to maintain a steadt speed "v" against an opposing force "F"
Term
 p = mv
Definition
 Momentum of a moving object
Term
 p = h/l (Where l can equal c/f)
Definition
 Momentum of a photon (traveling at "c", the speed of light) depends on its wavelength; h is Planck's constant
Term
 Ft = Dp = (mv)f – (mv)i
Definition
 Force x time ("impulse") equals momentum change
Term
 (m1v1 + m2v2)initial = (m1v1 + m2v2)final
Definition
 Conservation of momentum; use this when objects collide, or single objects separate into parts
Term
 r = m/V
Definition
 Density of an object or fluid
Term
 P = F/A
Definition
 Pressure is force applied over an area
Term
 P = rgh
Definition
 Relates pressure to how deep you are in a fluid
Term
 FB = rgVsubmerged
Definition
 Relates buoyant force to the amount of volume submerged in the fluid
Term
 v1A1 = v2A2 (vA equivalent to Volume/t)
Definition
 Relates how the speed and flow rate changes according to the cross-section area of the pipe
Term
 P2 – P1 = ½ r(v12 – v22)
Definition
 Fluids moving at different speeds exert different pressures
Term
 Felectric = kq1q2/d2
Definition
 Force of attraction/repulsion between two charged objects (or "point charges")
Term
 Felectric = Eq
Definition
 Force on a charged object depends on how much charge it has, and on the electric field surrounding it
Term
 V = kq/d
Definition
 Electric potential near a charged object depends on the amount of charge and your distance from it.
Term
 electric energy = q (V2 – V1)
Definition
 When a charged object moves, the energy gained/lost depends on the difference in potential ("voltage")
Term
 C = keoA/d
Definition
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