Velocity
V=D/T
Distance
D=VT
Time
T=D/V
Acceleration
a=ΔV/t
Force
F=ma
Work
W=Force X distance moved
Weight
W=mass X grav.
Power
P=Energy/t
Density
d=m/Volume
Load/Force
F=k(spring constant) X x(extension)
Kinetic Energy
Ek=1/2 X m X v^2
Gravitational potential energy
Eg=mgh
Efficiency
E=(Useful energy output/Energy input) X 100
Wavespeed
V=frequency X wavelength
Series resistance
Rt=R1 + R2
Parallel resistance
Rt=1/R1 + 1/R2
Resistance
R=Potential difference(volts)/Current
Energy
E=potential difference X current X time