Two horizontal forces act on a 5.0-kg mass. One force has a magnitude of 8.0 N and is directed due north. The second force toward the east has a magnitude of 8.0 N. What is the acceleration of the mass? O 2.3 m/s2 at 450 N of E O 1.6 m/s2 due north O 2.0 m/s2 at 530 N of E O 2.0 m/s2 at 53 m E of N