A free excitation direct current motor has been tested as a generator in the linear flux excitation zone, while the voltage at 215 rpm was idle at excitation current at 1 A, 215 V was measured from the end of the circuit and the endurance resistance was determined as 2 Ohm. After the test, 300 V direct voltage was applied to the industry as the motor at the same excitation current and 40 Nm torque (moment) and 1200 rpm (rpm) speed were measured on the load. Calculate the losses on the mechanical side under these operating conditions of the engine.