# Physics

**Created:**2011-05-12

**Last Modified:**2011-06-23

__v__

_{0}- v^{2}= v

_{o}

^{2}+2aΔx : Velocity as a function of displacement.

_{0}t + 1/2at

^{2}: Displacement as a function of time

_{0}+at : Velocity as a function of time

__Δv__=

__v__

_{f}- v_{i}_{f}- t

_{i}

__Δx__=

__x__

_{f}- x_{i}_{f}- t

_{i}

_{x}= A cos (ø) = X(A cos (ø)) B

_{x}= B cos (ø) = X(B cos (ø))

_{y}= A sin (ø) = Y(A sin (ø)) B

_{y}= B sin (ø) = Y(B sin (ø))

_{x}= A

_{x}+ B

_{x}R

_{y}= A

_{y}+ B

_{y}

_{x}

^{2}+ R

_{y}

^{2}

^{-1}(

__R__

_{y})_{x})

_{f}- R

_{i}V

_{avg}≡

__ΔR__A

_{avg}≡

__ΔV__

^{2}/s

^{2}and is a scalar quantity

_{fric}= -μ

_{k}mgΔx W

_{fric}= -μ

_{k}(mg - F

_{applied}sinθ)Δx

_{net}= W

_{applied}+ W

_{friction}+ W

_{n}+ W

_{g : N and G are not applied when perpindicular.}

^{2}measured in joules and IS A SCALAR

_{net}=KE

_{f}- KE

_{i}= ΔKE

_{avg}=

__Δθ__units: radians/second rev/s •

__2π rads__

_{avg}=

__Δω__SI unit: radians/second

^{2}positive in counterclockwise direction.

_{i}+ at

_{i}t + 1/2 at

^{2}

^{2}= ω

_{i}

^{2}+2aΔθ

_{t}= rω

_{t}= ra

_{c}=

__v__

__2__= rω

^{2 }a= sqrt:a

_{t}

^{2}+ a

_{c}

^{2}

__m__

_{1}

__m__

_{2}G=6.673 x 10

^{-11}N•m

^{2}/kg

^{2}

__r__

^{2}

_{}^{2}= (4π

^{2}/ GM

_{s})r

^{3}where M

_{s}is mass of sun or other central located body.

*T=Iα SI unit = N•m*

*T = rF(sin θ)*

*I =*mr

^{2}/ 2

*I*=

_{i}ω_{i}*I*

_{f}ω_{f}^{3 }v = π r

^{2}h

_{o}(atmospheric pressure) + pgh

^{2}+ ρgy

__Youngs modulus__: resistance of solid to elongation or compression,

*Y.*

__Shear modulus__: resistance to displacement of faces of solids sliding past eachother,

*S.*

__Bulk modulus:__the resistance of solid or liquid to change in volume,

*B.*

_{fluid}V

_{fluid}g

_{c}= 5/9(T

_{f}- 32)

_{k}= T

_{c + 273.15}

_{0}ΔT where α equals the coefficient of linear expansion.

_{0}ΔT where β equals (3α)

_{0}ΔT where γ equals (2α)

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