10\(ms^{-2}\)
12\(ms^{-2}\)
14\(ms^{-2}\)
17\(ms^{-2}\)
Correct answer is C
\(accl = \frac{\mathrm d V}{\mathrm d t}\)
\(V = 3t^{2} + 2t - 1 \therefore a = \frac{\mathrm d V}{\mathrm d t} = 6t + 2\)
\(a \text{(after 2 seconds)} = (6\times 2) + 2 = 12+2 = 14ms^{-2}\)