Question 6 5 pts A truck is carrying a 120-kg refrigerator, which is 2.20 m tall and 85.0 cm wide has its center of mass at its geometrical center. The refrigerator is facing sideways and a short strip on the bed of the truck keeps the refrigerator from sliding. What is the maximum acceleration that the truck can have before the refrigerator begins to tip over? O 4.17 m/s2 1.90 m/52 O 7.58 m/52 O 8.34 m/s2 O 3.79 m /5 2Question 4 5 pts A 3.00-m-long ladder, weighing 200 N, rests against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.00 m away from the wall. If the center of mass of the ladder is 1.20 m from its base, what frictional force must the floor exert on the base of the ladder in order for the ladder to be in static equilibrium? 130 N 150 N O 93.3 N 102 N O 28.3 NQuestion 7 5 pts FIGURE 11-6 25 3.00 m A store's sign, with a mass of 20.0 kg and 3.00 m long, has its center of gravity at the center of the sign. It is supported by a loose bolt attached to the wall at one end and by a wire at the other end, as shown in Figure 11-6. The wire makes an angle of 25.0 with the horizontal. What is the magnitude of the force exerted by the bolt on the sign