A mine cart is pulled to the surface over the curved track by the cable wound around the drum. The shape of the track is designed so that y = x?/16, where x and y are in meters. The dimensions of the cart may be neglected when compared with those of the path and friction is also negligible. When the cart reaches a level of 3,1 m below the top, the cable is pulled up at a speed of 4 m/s with an increasing rate of 1,2 m/s?, Determine the normal acceleration of the cart at that instant. Ltfen birini sein: O a. 1,01 m/s^2 Ob. 0,42 m/s^2 Oc. 0,00 m/s^2 Od. 1,27 m/s^2 O e. 0,85 m/s^2