# Shared Flashcard Set

## Details

Physics GRE - Mechanics
equations for pgre
28
Physics
10/21/2012

## Additional Physics Flashcards

Term
 Normal modes in waves: λ=   f=   (closed at one end)
Definition
 =4L/n   =n*v/(4L)   (n=1,2,3...)
Term
 Normal Modes in Waves λ=   f=   (open at both ends)
Definition
 =2L/n   =n*v/(2L)
Term
 Doppler Shift f'=
Definition
 =f*(v+v0)/(v-vs)
Term
 Linear Eqn. for Wave:
Definition
 ∂2y/∂x2=1/v2*∂2y/∂t2
Term
 Angular Frequency of pendulum: ω=   Period: T=
Definition
 =√(g/L)   =2π*√(L/g)
Term
 Period of a mass on a spring: T=   Angular frequency: ω=
Definition
 =2π*√(m/k)     =√(k/m)
Term
 Period of circular/harmonic motion: T=
Definition
 =2π/ω
Term
 Bouyant force: FB=
Definition
 =ρfluidgV   (V=volume of displaced fluid)
Term
 Variation of Pressure with depth: P=
Definition
 =P0+ρgh
Term
 Escape velocity:   vesc=
Definition
 √(2GM/R)
Term
 Kepler's Third Law: T2=
Definition
 =(4π2/(GM))*a3   (a= semimajor axis)
Term
 Angular Momentum: L=   Lz=
Definition
 =r x p =mvrsinθ   =Iω
Term
 Torque: τ=
Definition
 =Iα =dL/dt =r x F
Term
 Parallel-Axis Theorem: I=
Definition
 =Icm+MD2
Term
 Rotational KE: TR=
Definition
 =½Iω2
Term
 Moment of Inertia:   I=
Definition
 =Σmr2   =∫r2dm =∫ρr2dV
Term
 Angular Acceleration: α=
Definition
 =dω/dt =aT/r
Term
 Angular speed: ω=
Definition
 =dθ/dt =vT/r
Term
 Arclength: s=
Definition
 =rθ
Term
 Center of Mass Position: rcm=
Definition
 =1/M Σmr =1/M ∫r dm
Term
 Impulse: I=
Definition
 =Δp =∫F dt
Term
 Instantaneous Power: P=
Definition
 =dE/dt =dW/dt =F dr/dt
Term
 ΔEmech=   (When non-conservative forces are present)
Definition
 =-∑Wncf
Term
 -del(U)=
Definition
 =F
Term
 work: W=
Definition
 =F · r =ΔKE
Term
 Centrepetal acceleration: ac=
Definition
 v^2/r
Term
 Four vector scalar product
Definition
 s=r2-(ct)2
Term
 Four momentum scalar product
Definition
 p · p = -(mc)2
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