# Shared Flashcard Set

## Details

AP C Mechanics equations LHS
AP C Mechanics Equations LHS
29
Physics
03/30/2012

Term
 Newton’s second law
Definition
 F = m dv/dt    F= ma   (Newtons or kg m/s2 )
Term
 Weight
Definition
 W = mg       (Newtons)
Term
 Kinetic Energy
Definition
 KE = ½ mv2  (Joules)
Term
 Elastic potential energy
Definition
 U = ½ kx2      (Joules ) Remember k is in N/m
Term
 Work integration of force
Definition
 w = ∫ f dx      (joules or N-m)   Remember F parallel to X w = F x cos (theta)
Term
 Power
Definition
 P = ∆ E/t   or ∆ME/t or ∆KE/t or  W/t or F v   P = dW/dt   (Watts or J/s)
Term
 Coefficient of friction
Definition
 μ = Ff  / Fn   (Dimensionless)
Term
 Impulse momentum
Definition
 F∆t = m ∆v    ∆ρ= ∫F dt     (N-s or kg-m/s)   Remember area under F vs t graph
Term
 Newton’s Universal law of gravitation
Definition
 1.    F = G m1 m2/ r2  G = 6.67x 10-11 N m2/kg2   r measured from center of mass
Term
 General term for the accleration due to gravity
Definition
 1.    g = G me / r2  (m/s)   G = 6.67x 10-11 N m2/kg2
Term
 General term for Gravitational potential energy
Definition
 PE = -G m1 m2/ r (J) Don't forget the negative and PE = 0 at infinity
Term
 Centripetal Acceleration
Definition
 Ac = ω2 r   Ac = v2/r   (m/s2 )   Pointed toward the center
Term
 Torque
Definition
 T = F X sin (theta)    (N-m) not Joules   F perpendicular to X
Term
 Period of a pendulum
Definition
 T = 2 π √(L/g)   (s)
Term
 Period of spring mass
Definition
 T = 2 π √(m/k)    (s)
Term
 Period of a physical pendulum
Definition
 T = 2 π √(I/mgd)   (s)
Term
 Center of mass
Definition
 Xcm = ∑(x m) / ∑(m)  or   Xcm = ∫ r dm
Term
 Moment of Inertia
Definition
 I = mr2  (point mass)    I = ∫ r2 dm (distributed mass)   (kg m2 )
Term
 Rotational momentum
Definition
 L = I ω   ( kg m2 /s)
Term
 Newton’s law for angular motion
Definition
 T = I α   (kg m2 /s2 )
Term
 Rotational KE
Definition
 KEr = ½ I ω2   (J)
Term
 Motion as it relates to drag
Definition
 F = m dv/dt   mg- bv2 = m dv/dt
Term
 Terminal Velocity
Definition
 if mg- bv = ma then vt = mg/b
Term
 Spring constant (hooke's law)
Definition
 K = f/x   (N/m) slope of the f vs x graph
Term
 Force as a function of potential Energy
Definition
 F = dU/dx
Term
 Keplers 3rd Law
Definition
 T2 = (4 π2/GMs) r3   Period in seconds
Term
 Constant a equations
Definition
 x = vit + ½ at2     Vf 2 = Vi2  + 2 a x
Term
 Conversion of linear to angular
Definition
 s = r Θ   v = r ω   a = r α
Term
 Parallel Axis Theorem
Definition
 Ipa = Icm + mr2   Where r is the distance from the cm to the axis of rotation
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