Unit 2 : Applied Science Physics

potential energy = mass x acceleration x height 

             (J)                (kg)       (ms-2 )            (m)

kinetic energy = 1/2 x mass x velocity2

                    (J)                         (kg)      (ms-1)

work done = energy transferred 

power = work done / time taken

(w)             (J)               (S)

cost = power x time x cost per unit 

efficiency = useful energy output / total energy input x 100%