Power and efficiency

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

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