Two horizontal forces act on a 3.8 kg chopping block that can slide over a frictionless kitchen counter, which lies in an xy plane. One force is F 1 = (8.6 N) i + (1.7 N) 7. Find the acceleration of the chopping block in unit-vector notation when the other force is (a) F2 = (-8.6N) i+ (-1.7N) 7.(b) F2 = (-8.6N) 7+ (1.7N) 7, and (c) F2 = (8.6 N) 7 + (- 1.7N) 7. (a) Number Units (b) Number i Units (c) Number i it i Units