Formulas:

Speed

Speed

s=d/t

speed (m/s) =distance (m) /time (s)

Density

d=m/v

density (kg/m2) =mass (kg) / volume (m2)

Pressure

p=f/v

pressure (Pa or N/m2) = force (N) / volume (m2)

Weight

w=mg

weight (N) =mass (kg) * gravitational field strength (N/kg)

Acceleration

a=delta v/delta t

acceleration (m/s2) = change in velocity (m/s) / change in time (s)

Acceleration of free fall

g=w/m

accelaration of free fall = weight / mass

g is a constant always equals to approximately 9.8 m/s2

Force

f=ma

force (N) = mass (kg) * acceleration (m/s2)

Acceleration

a=f/m

acceleration (m/s2) = force (N) / mass (kg)

Moment

m=fd

m (J) = force (N) * distance (m)

Work done

W=fd

Work done (J) = force (N) * distance (m)

Work done (J) = change in energy or energy transferred

Power

P=W/t

power (W, watts) = work done (J) / time (s)

Gravitational potential energy

GPE=wh=mgh

GPE (J) = weight (N) * height (m)

Kinetic energy

KE=1/2(mv^2)

KE (J) = 1/2 ( mass (kg) * velocity (m/s) sq

Gas pressure

p a T

Gass pressure is directly proportional to temperature

p a 1/v

Gass pressure is inversely proportional to volume

Speed of waves

v=fλ

v (m/s) = frequency (Hz) * wavelength (λ)

Refractive index

speed of light in vacuum / speed of light in medium

300,000,000 (m/s) / spped of light in medium

sin i/sin r

sin (incident angle) / sin (refracted angle)