3) Your friend is really excited. He thinks he has found a way to solve the energy crisis. He shows you a circuit with a cell and one motor. Then he attaches a second and a third motor to the same battery and each one is moving about as fast as the single one was. This means you can get as much energy out of a single cell as you want! (K/U, A, C. T/I) a) Draw a circuit of the cell and the three motors. (3 marks) b) Explain, including appropriate equations, why this won't provide infinite amounts of energy