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- Physics SAT II Formula Flashcards

Sam K.

v_{avg} = Δd/Δt

v_{avg} = average velocity

Δd = displacement

Δt = elapsed time

v_{avg} = (v_{i} + v_{f})/2

v_{avg} = average velocity

v_{i} = initial velocity

v_{f} = final velocity

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a = Δv/Δt

a = acceleration

Δv = change in velocity

Δt = elapsed time

Δd = v_{i}Δt + ½a(Δt)^{2}

Δd = displacement

v_{i} = initial velocity

Δt = elapsed time

a = acceleration

Δd = v_{f}Δt - ½a(Δt)^{2}

Δd = displacement

v_{f} = final velocity

Δt = elapsed time

a = acceleration

v_{f}^{2 }= v_{i}^{2} + 2aΔd

v_{f} = final velocity

v_{i} = initial velocity

a = acceleration

Δd = displacement

F = ma

F = force

m = mass

a = acceleration

W = mg

W = weight

m = mass

g = acceleration due to gravity

F_{f} = μF_{n}

F_{f} = friction fore

μ = coefficient of friction

F_{n} = normal force

p = mv

p = momentum

m = mass

v = velocity

Δp = F(Δt)

Δp = change in momentum

F = applied force

Δt = elapsed time

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W = Fd cos(θ)

W = work

F = force

d = distance

θ = angle between F and the direction of motion

W = F_{||}d

W = work

F_{||} = parallel force

d = distance

KE = ½mv^{2}

KE = kinetic energy

m = mass

v = velocity

PE = mgh

PE = potential energy

m = mass

g = acceleration due to gravity

h = height

W = Δ(KE)

W = work done

KE = kinetic energy

ME = KE + PE

ME = total mechanical energy

KE = kinetic energy

PE = potential energy

P = W/Δt

P = power

W = work

Δt = elapsed time

a_{c} = v^{2}/r

a_{c} = centripetal acceleration

v = velocity

r = radius

F_{c} = mv^{2}/r

F_{c} = centripetal force

m = mass

v = velocity

r = radius

v = 2∏r/T

v = velocity

r = radius

T = period

τ = rF sin(θ)

τ = torque

r = distance (radius)

F = force

θ = angle between F and the lever arm

τ = rF_{⊥}

τ = torque

r = distance (radius)

F_{⊥} = perpendicular force

L = mvr

L = angular momentum

m = mass

v = velocity

r = radius

F_{s}= ±kx

F_{s} = spring force

k = spring constant

x = spring stretch or compression

PE_{s} = ½kx^{2}

PE_{s} = potential energy stored in spring

k = spring constant

x = amount of spring stretch or compression

F_{g} = G(m_{1}m_{2}/r^{2)}

F_{g} = force of gravity

G = a constant

m_{1},_{ }m_{2} = masses

r = distance of separation

F_{e} = k(q_{1}q_{2}/r^{2})

F_{e} = electric force

k = a constant

q_{1}, q_{2}, = charges

r = distance of separation

F = qE

F = electric force

E = electric field

q = charge

E = k(q/r^{2})

E = electric field

k = a constant

q = charge

r = distance of separation

E = V/d

E = electric field

V = voltage

d = distance

ΔV = W/q

ΔV = potential difference

W = work

q = charge

V = IR

V = voltage

I = current

R = resistance

P = IV or P = V^{2}/R or P = I^{2}R

P = power

I = current

V = voltage

R = resistance

R_{s} = R_{1 }+ R_{2 }+ …

R_{s} = total resistance in a series circuit

R_{1} = first resistor

R_{2} = second resistor

…

1/R_{p} = 1/R_{1} + 1/R_{2} …

R_{p} = total resistance in a parallel circuit

R_{1} = first resistor

R_{2} = second resistor

…

q = CV

q = charge

C = capacitance

V = voltage

F = ILβ sin(θ)

F = force on a wire

I = current in the wire

L = length of wire

β = external magnetic field

θ = angle between the current direction and the magnetic field

F = qvβ sin(θ)

F = force on a charge

q = charge

v = velocity of the charge

β = external magnetic field

θ = angle between the direction of motion and the magnetic field

v = fλ

v = wave velocity

λ = wavelength

f = frequency

v = c/n

v = velocity of light

c = velocity of light in a vacuum

n = index of refraction

n_{1} sin(θ_{1}) = n_{2} sin(θ_{2})

n_{1} = incident index

θ_{1} = incident angle

n_{2} = refracted index

θ_{2} = refracted angle

1/d_{o} + 1/d_{i} = 1/f

d_{o} = object distance

d_{i} = image distance

f = focal length

m = -(d_{i}/d_{o})

m = magnification

d_{i} = image distance

d_{o} = object distance

Q = mcΔT

Q = heat added or removed

m = mass of substance

c = specific heat

ΔT = change in temperature

Q = ml

Q = heat added or removed

m = mass of substance

l = specific heat of transformation

ΔU = Q - W

ΔU = change in internal energy

Q = heat added

W = work done by the system

E_{eng} = (W/Q_{hot}) × 100%

E_{eng} = % efficiency of the heat engine

W = work done by the enginge

Q_{hot} = heat absorbed by the engine

P = F/A

P = pressure

F = force

A = area

PV/T = constant

P = pressure

V = volume

T = temperature

E = hf

E = photon energy

h = a constant

f = wave frequency

λ = h/p

λ = matter wavelength

h = a constant

p = momentum

γ = 1/√(1-(v/c)^{2})

γ = the relativistic factor

v = speed of moving observer

c = speed of light

v_{esc} = √(2Gm/r)

V_{esc} = escape velocity; the minimum velocity required to escape a gravitational field

G = universal gravitational constant

M = mass of body which produces the gravitational field

R = mean radius of body which produces the gravitational field

v_{orbit} = √(Gm/r)

G = universal gravitational constant

M = mass of body which produces the gravitational field

R = mean radius of body which produces the gravitational field

v_{1}/v_{2} = T_{1}/T_{2 }(Charles' Law)

v_{1, }v_{2} = volume of ideal gas at temperature T_{1 }or T_{2}

T_{1}, T_{2} = Absolute temperature (in Kelvins)

V = k/P (Boyle's Law)

V = volume of ideal gas

k = a constant

P = pressure of ideal gas

(Does not apply in an adiabatic process)

P_{1}V_{1}/T_{1} = P_{2}V_{2}/T_{2}

-Ideal gas law (volume, pressure, time)

-Combo of Charles' and Boyle's Laws

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