Quantity measured |
Formula |
Power |
Power = force x velocity |
Power |
Power = VI = V2/R = I2R |
Pressure |
Pressure = Force/Area |
Refractive index |
Refractive index (n) = sin i/sin r = ci/cr |
Resistivity |
Resistivity (r) = RA/L |
Resistors in parallel |
1/R = 1/R1 + 1/R2 |
Resistors in series |
R = R1 + R2 |
Speed (velocity) |
Distance/time |
Strain |
Strain = Extension/original length |
Stress |
Stress (s) = F/A |
Torque (moment of a couple) |
Torque = Force x distance between the forces |
Uniformly accelerated motion |
s = ut + at2 v2 = u2 + 2as |
Wave speed |
Wave speed = frequency x wavelength |
Weight |
Weight = mg |
Work done |
Work done = Fscosq |
Young modulus |
E = stress/strain = FL/eA |