Question 3 (6 marks) For the flywheel practical, a falling mass [(m =0.12 kg) was used to rotate a metal bar, as shown in the figure below. Assume the moment of inertia of the rotating bar is I = 15.4 = 102 kg m? and the radius of the axle is r= 1.88 x 102 m. ! rotating bar mass m Use the data in the table to calculate the energy lost E i i [ Eiss) by the system during this measurement. rotation platform mm Vinitial @ b1 (ms1) | Vpna @ hz (ms-1) 0.951 0.212 0.000 0.165