Question:9 As shown in figure, there is a flat plank at reat on a very slippery surface. You have disc of molus a and mass equal to the mass of the disc (say M). You rotated the disc with an initial angular speed Band carefully placed it on the plank. The coefficient of friction between the disc and plank is You noticed that, finally when the slipping stops, the 50% of the total kinetic energy of the system is lost. If the plank is long enough, determine the time when slipping stops after placing the disc: Vioug aw ug aw 4ug V3aw ug Question:10 Choose the current statement regarding the circuit 20 1. 4 UF S 6V- 80 2LF $ 40 O Long time after the switch S is closed. ly=0.6A 12 0 and ly=0 O Long time after the switch S is closed. ly= = =0.6A O Just after the switch S is closed, 1 3A ly 3A and ly=0 O Just after the switch 5 is closed. I,-3A I, DA and 17 0