equations

mass x gravitational field strength 

W = m g

force x distance 

                                  (along the line of action of the force)

W = F s

spring constant x extention

F = K e

force x distance 

                                       (normal to direction of force)

M = F d

force normal to a surface / area of the surface

p = F/A

speed x time

s = v t

change in velocity / time taken 

a = av/t

mass x acceleration 

F = m a

mass x velocity 

p = m v

0.5 x mass x (speed)^

Ek = 1/2m v^

 mass x gravitational field  strength(g) x height 

Ep = m g h

energy transferred / time

P = e/t

work done / time

P = w/t

     useful output energy transfer                                total input energy transfer

     useful power output                                                total power output

frequancy x wavelength

v = f a

current x time

Q = I t

current x resistance 

V = I R

potential difference x current

P = V I

(current)^ x resistance

P = I^ R

power x time 

E = P t

Charge flow x potential difference 

E = Q V

mass / volume

p = m / V