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AP Physics Formulas
AP Physics formulas and units you must memorize
Question | Answer |
---|---|
Definition of average velocity | v=Δd/Δt |
Speed and angular velocity relationship | Ï=v/r |
Definition of acceleration | a=Δv/Δt |
Time of Free fall | t=√2y/g |
Acceleration and angular acceleration realtionship | α=a/r |
Weight | W=mg |
Weight on an incline (parallel) | F=mg sinθ |
Weight on an incline (perpendicular) | F=mg cosθ |
Centripetal force | Fc=mv^2/r |
Centripetal speed | v=2πr/T |
Orbital Speed | v=√G(M/r) |
Power | P=Fv |
Work-energy theorem | W=ΔKE=½mvf^2-½mvi^2 |
Conservation of energy | KEi+PEi=KEf+PEf |
Conservation of energy (friction) | KEi+PEi=KEf+PEf+Energy (Ff*d = energy lost from friction) |
Momentum and angular momentum | L=pr |
Impulse (change in momentum) | Δp=FΔt=mΔv |
Change in angular momentum | ΔL=τnetΔt=IΔω |
Conservation of momentum (elastic) | m1v1i+m2v2i=m1v1f+m2v2f |
Totally inelastic | m1v1i+m2v2i=(m1+m2)vf |
Recoil | (m1+m2)vi=m1v1f+m2v2f OR m1v1f=-m2v2f (if v1=0 m/s) |
Conservation of angular momentum | (I1)f(ω1)f+(I2)f(ω2)f=(I1)i(ω1)i+(I2)i(ω2)i |
Harmonics | ƒn=nv/2L n is harmonic # and L is length ƒn=nv/4L |
Power relationships (electricity) | P=V^2/R P=I^2R |