Unit 4 physics equations 2.0 / 5 based on 2 ratings ? PhysicsA2/A-levelEdexcel Created by: Acacia SheppardCreated on: 13-06-13 08:33 Momentum p=mv (kgms^-1) 1 of 26 Resultant force F=ma (N) 2 of 26 Kinetic energy Ek=(1/2)mv^2 (J) 3 of 26 Kinetic energy in terms of momentum Ek=p^2/2m (J) 4 of 26 Angle in radians from degrees angle in radians=(2pi/360) x angle in degrees (rad) 5 of 26 Angular speed w=angle/time (rads^-1) 6 of 26 Linear speed v=wr (ms-1) *r is radius 7 of 26 Frequency and period (3 equations) f=1/T or w=2pif or T=2pi/w (f in s-1, T in s) 8 of 26 Centripetal acceleration (two equations) a=v^2/r or a=rw^2 (ms^-2) 9 of 26 Centripetal force (two equations) F=mv^2/r or F=mw^2r (J) 10 of 26 Coulomb's law F=kQ1Q2/r^2 where k=1/4(pi)(epsilon) (J) 11 of 26 Electric field strength E=F/Q (NC^-1) 12 of 26 Electric field strength in a radial field E=kQ/r^2 where k=1/4(pi)(epsilon) (NC^-1) 13 of 26 Electric field strength in a uniform field E=V/d (NC^-1) 14 of 26 Capacitance C=Q/V (F) 15 of 26 Work done by a capacitor W=(1/2)QV (J) 16 of 26 Energy stored by a capacitor (3 equations) W=(1/2)QV or W=1/2CV^2 or W=Q^2/2C (J) 17 of 26 Charge left on the plates of a capacitor discharging from full Q=Qoe^(-t/RC) (C) RC=time constant. 18 of 26 Magnetic fiux phi=BA where B is the magnetic field and A is the area (Wb) 19 of 26 Magnetic flux linkage PHI=Nphi=BAN (Wb) 20 of 26 Magnetic force F=BIlsin(angle) (N) l is the length of wire 21 of 26 Force acting on a sigle charged particle moving in a magnetic field F=Bqvsin(angle) (N) where q is charge and v is velocity 22 of 26 Faraday's law induced e.m.f = dPHI/dt = d(phiN)/dt (V) 23 of 26 Lenze's law (and Faraday's) induced e.m.f= d(Nphi)/dt (V) 24 of 26 de Broglie equation lambda=h/p where p is momentum (m) 25 of 26 Radius of a charged particle's curved track r=p/BQ (m) 26 of 26
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