Cheatography
https://cheatography.com
Some physics formulas that will be useful in kinematics. Not a truly complete list of formulas though, as some things are missing.
I can't think of any more formulas for this cheat sheet though, so suggestions on what to add would be helpful.
Kinematics 2D Motion
V = V0 + at 
V0 = Initial velocity of object V = Final velocity of object a = Acceleration of object t = Time 
V^{2} = V0 ^{2} + 2aΔx 
V0 = Initial velocity of object V = Final velocity of object a = Acceleration of object Δx / Δy = Change in position 
Δx = V0 t + ½at^{2} 
Δx / Δy = Change in position V0 = Initial velocity t = Time a = Acceleration 
F = ma 
F = Force from object m = Mass of object a = Acceleration of object 
Ff = μN 
Ff = Force of friction μ = Coefficient of friction N = Normal force 
Note: Some formulas may involve BOTH the x and y directions, as well as incorporate other formulas outside kinematics.
Momentum
FΔt = Δp = mV  mV0 
FΔt = Δp = Impulse mV = Final momentum mV0 = Initial momentum 
mVbefore  mV0before = mVafter  mV0after 
Note: Momentum is ALWAYS conserved. You may need to note that the momentum before is equal to the momentum after.
Energy
W = Fd 
W = Work done F = Force applied d = Distance travelled 
W = ΔKE = ½mV^{2}  ½mV0 ^{2} 
W = Work done m = Mass of object V = Final velocity V0 = Initial velocity 
Ug = mgh 
Ug = Work done by gravity m = Mass g = Gravity h / d = Height or distance traveled 
FS = kx 
FS = Force of spring (Restored Force) k = Spring coefficient x = Distance from equilibrium 
WS = US = ½kx^{2} 
WS = Work done by spring k = Spring coefficient x = Distance from equilibrium 
KE = ½mV^{2} 
KE = Kinetic Energy m = Mass v = Velocity of object 
KE + Ug + US = KE + Ug +US + W 
KE = Kinetic Energy (is the object moving?) Ug = Work done by gravity (is the object above where you set x = 0?) US = Work done by spring (is a spring involved?) W = Friction (did energy go to friction?) 
Note: Energy is SOMETIMES conserved depending on the situation. Inelastic collisions cannot apply the conservation of energy because of the loss of energy. However, you can apply the conservation of energy for elastic collisions.


Rotational Motion
ω = ω0 + αt 
ω0 = Angular initial velocity ω = Angular final velocity α = Angular acceleration t = Time 
ω^{2} = ω0 ^{2} + 2αθ 
ω0 = Angular initial velocity ω = Angular final velocity α = Angular acceleration θ = Angular change in position 
θ = ω0 t + ½αt^{2} 
θ = Angular change in position ω0 = Angular initial velocity t = Time α = Angular acceleration 
VT = rω 
VT = Tangential (Linear) velocity r = Radius ω = Angular final velocity 
aT = rα 
aT = Tangential (Linear) acceleration r = Radius α = Angular acceleration 
aC = VT ^{2} / r 
aC = Centripetal acceleration VT = Tangential (Linear) velocity r = Radius 
ar = rω^{2} 
ar = Radial Acceleration r = Radius ω = Angular velocity 
τ = F⊥ d 
τ = Torque F⊥ = Perpendicular Forces d= Distance from Pivot Point 
I = Σmr^2 
I = Moment of Inertia (Rotational Moment / Rotational Intertia) Σmr^{2} = Total of each Mass x Radius Squared 
KEC = 1/2(I)ω^{2} 
KEC = Kinetic Circular Energy I = Moment of Inertia (Rotational Moment / Rotational Intertia) ω = Angular velocity 
τ = Iα 
τ = Torque I = Moment of Inertia (Rotational Moment / Rotational Intertia) α = Angular acceleration 
KER = 1/2 IP ω^{2} = 1/2(ICOM + mh^{h})ω^{2} =1/2(m(VCOM )^{2}) + 1/2Iω^{2} 
KER = Kinetic Rolling Energy 1/2(m(VCOM )^{2}) = Sliding Equation 1/2Iω^{2} = Rotation Equation 
l = mrω 
l = Momentum of a particle 
L = Iω 
L = Momentum of a rigid body (not a particle) 
NOTE:
 You may need to consider that ω = dθ / dt and α = dω / dt.
 Account for all objects rotating the pivot point when calculating I.
 Momentum is ALWAYS conserved.

Created By
Metadata
Favourited By
Comments
hannymichael, 23:06 14 Mar 21
very well organized
Add a Comment
Related Cheat Sheets