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Equations for AP Physics C
Mechanics Portion
30
Physics
12th Grade
04/27/2009
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Term
Equation for velocity?
 Definition
V=Vi + at
Term
Equation for Position?
 Definition
X = Xi + Vit + .5at^2
Term
equation for velocity that does not require time?
 Definition
v^2=Vi^2 + 2a(x-Xi)
Term
Net Force?
 Definition
∑F = Fnet = ma
Term
Force in terms of momentum
 Definition
F= dp/dt
Term
Impulse formula?
 Definition
J = ∫Fdt = ∆p
Term
momentum formula?
 Definition
p=mv
Term
Force of friction?
 Definition
Ffric ≤ μN
Term
Work
 Definition
∫F•dx
Term
Kinetic Energy
 Definition
k=.5mv2
Term
Power
 Definition
P=dW/dt
Term
Power in terms of force
 Definition
P=F•v
Term
Potential Energy (height)
 Definition
∆Ug = mgh
Term
Acceleration (circular)
 Definition
a = (v^2)/r = (w^2)r
Term
Torque
 Definition
τ = r X F
Term
Net torque
 Definition
∑τ = τnet = Iα
Term
Rotational Inertia
 Definition
I = ∫r^2dm = ∑mr^2
Term
radius
 Definition
∑mr/∑m
Term
rotational velocity
 Definition
v=rw
Term
Angular Momentum
 Definition
L = r X p = Iw
Term
rotational kinetic energy
 Definition
K = 1/2Iw^2
Term
angular speed
 Definition
w = Wi + αt
Term
angular position
 Definition
θ = θi + Wit + .5αt^2
Term
Force of a spring
 Definition
Fs = -kx
Term
Potential energy (spring)
 Definition
Us = .5kx^2
Term
Period
 Definition
T = 2π/w = 1/f
Term
Period of a spring
 Definition
2π(m/k)^.5
Term
Period (Pendulum)
 Definition
Tp = 2π(l/g)^.5
Term
Gravitational force
 Definition
Fg = -Gm1m2/r^2
Term
Potential Energy (gravity)
 Definition
Ug = -Gm1m2/r
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