The following net force acts on a 5 kg object. F with rightwards harpoon with barb upwards on top subscript n e t end subscript equal open square brackets open parentheses 3 N over s close parentheses t close square brackets x with hat on top plus open square brackets open parentheses 2 N over s to the power of 2 close parentheses t to the power of 2 close square brackets y with overbrace on top What is the magnitude of the acceleration (in m/s2) of the object at t = 2 s?