3 sec
2 sec
4 sec
1 sec
Correct answer is A
\(u = 27 ms^{-1}; a = -9 ms^{-2}; v = 0; t = ?\)
\(v = u + at; t = \frac{v - u}{a}\)
\(t = \frac{0 - 27}{-9} = \frac{-27}{-9}\)
\(\therefore t = 3 sec\)
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