5. Two Small Men with Big Hearts must move a refrigerator across the floor. They must exert a forward force of 524 N to get the fridge from rest and get it up to speed. The 158- kg fridge (full of food) experiences 418 N of friction. a. What is the fridge's acceleration during this phase of its motion? (ans: 0.671 m/sz) b. If they maintain this forward force for 1.44 seconds, then what speed will the fridge have? (ans: 0.966 m/s)