4. (25 points) A 0.36 m long metal bar is pulled by an applied force F. The bar rides on U shaped metal rail that has 145 9 resistance, so the apparatus makes a complete circuit. You can ignore the resistance of the bar. The circuit is in a uniform 2.65 T magnetic filed directed into the plane of the figure. At the instant when the bar is moving at 9.90 m/s, [a] is induced current in the circuit clockwise or counterclockwise? X X X X X X X X X X X [b] What is the rate at which the applied force is doing work on the bar