Physics Formulas (Units 4, 5, and 6) Flashcards by Shawn Presher

Q

Frequency =

A

F = 1/T

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Q

Time (in terms of freq.) =

A

T = 1/f

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Q

Acceleration (Newton’s Second Law) =

A

a = F/m

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Q

Acceleration (expression for force) =

A

a = -(k/m) * x

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Q

Position (Simple Harmonic Motion) =

A

x = Acos(ωt)

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Q

Velocity (Simple Harmonic Motion)

A

v = -ωAsin(ωt)

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Q

Acceleration (Simple Harmonic Motion) =

A

a = -(ω^2)Acos(ωt)

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Q

ω (in terms of force constant and mass) =

A

ω = (k/m)^(1/2)

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Q

frequency (in terms of force constant and mass) =

A

((pi/2)*(k/m))^(1/2)

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Q

ω (in terms of gravity and length of pendulum) =

A

ω = (g/L)^(1/2)

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Q

Intensity of Sound =

A

I = (10^-12)*(10^(ß/10decibels)

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Q

density =

A

d = m/v

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Q

pressure (in terms of force and surface area) =

A

p = F/A

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Q

change in pressure =

A

p - p₀ = -ρg*(change in height)

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Q

Q (heat) =

A

Q = mcΔT

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Q

ΣF (conservation of forces) =

A

ΣF = 0

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Q

ΣVector (General Conservation Problems) =

A

ΣVector = 0

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Q

Q (Heat during Phase Change) =

A

Q = mL

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Q

Kinetic Energy =

A

KE = (1/2)m(v^2)

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Q

Moment of Inertia =

A

Depends on the object (Reference tables)

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Q

Moment of Inertia for a Particle

Study These Flashcards

A

I = m*(r^2)

Q

Work (rotational motion)

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A

W = rθ

Q

Degrees (In terms of Radians) =

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A

Deg = (pi/180)rad

Q

θ = (in terms of radians)

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A

θ = (arc/radius)rad

x-x₀ (big five #1) =

x-x₀ = average velocity * time

v-v₀ (big five #2) =

v-v₀ = a*t

x-x₀ (big five #3=

x-x₀ = v₀*t + (1/2)a*(t^2)

x-x₀ (big five #4) =

x-x₀ = t(v+v₀)/2

v^2 - v₀^2 (big five #5) =

v^2 - v₀^2 = 2a(x-x₀)

Center of Mass =

(x1*m1+x2*m2 ... )/(m1+m2 ... )

Torque =

τ = rFsinΦ

momentum =

p = mv

Elastic Collisions

Momentum is conserved

Inelastic Collisions

Momentums Subtract from each other

Work =

W = F*(displacement)

Potential Energy =

PE = mgΔh

Force (Elastic PE)

F = -kx

Potential Energy (Elastics)

PE = (-1/2)k(x^2)

ΔPE (Conservation of Energy) =

ΔPE = ΔKE

Average Power =

ΔWork/Δt

Centripetal Acceleration =

a = (v^2)/r

Centripetal Force =

F = (m*(v^2))/r

Force of Friction =

f = μN

Orbital Speed =

v = (Gm₀/r)^(1/2)

Orbital Period =

T^2 = (4(pi^2)*r^3)/(Gm₀)

weight =

w = mg

Force (in terms of mass and acceleration)

F = m*a

Resultant =

R = ((Rx)^2 + (Ry)^2)^(1/2)

Resultant Angle =

tan-1(Ry/Rx)

% diff =

% diff = (|x-avg|)/avg

% deviation =

% deviation = (|experiemental-actual|)/(actual)