Power and efficiency

Define power, its equation, its regular and SI base unit

The rate of work done, W, Watt, kgm²s^-3

P = W/t = e/t

What is the equation for power that includes velocity and how is it derived?

P = W/t, W = Fd

P = Fd/t, v = d/t

P = Fv

P = power, W, kgm²s^-3

F = force, N, kgms^-2

v - velocity, ms^-1

Define 1W

A transfer of energy of 1J is 1s

What is the equation for efficiency?

Total useful output energy / total output energy x 100