AP Physics 1&2 Unit 7 Rotational Kinematics
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Last updated 5:30 PM on 11/30/22
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15 Terms
1
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ω
θ/∆t
2
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Rotational Kinematic Equations
ωf = ωi + αt
∆θ = ωit + 1/2αt²
∆θ = (ωi + ωf)t/2
ωf² = ωi² +2α∆θ
∆θ = ωit + 1/2αt²
∆θ = (ωi + ωf)t/2
ωf² = ωi² +2α∆θ
3
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Equations for no slipping
s = rθ
v = rω = ∆s/∆t
a = rα
v = rω = ∆s/∆t
a = rα
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KE
½Iω²
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∑T
Iα
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Angular impulse
∑T∆t = I∆ω
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Angular Momentum
L = Iω = pl
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I of a sphere
2/5 (mr²)
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Rotational Inertia
∑mr²
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Ratios of elliptical orbit
v₁/v₂ = r₂/r₁
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Torque Formula
T = Fl
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Friction formulas
F = µkN
Fsmax = µsN
Fsmax = µsN
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Work of non conservative forces
W = Ef - Ei
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Equations for Potential and Kinetic energy (linear)
PE = mgh
KE = ½mv²
PEg = -Gm₁m₂/r
KE = ½mv²
PEg = -Gm₁m₂/r
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Translational Kinematic Equations
Vf = Vi + at
∆x = Vit + ½at²
∆x = (Vi + Vf)t/2
Vf² = Vi² + 2a∆x
∆x = Vit + ½at²
∆x = (Vi + Vf)t/2
Vf² = Vi² + 2a∆x
Note 
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