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A particle moves along a straight line such that its displacement s at any time t is given by  s = t3 - 6t2 + 3t + 4 metre. The velocity, when the acceleration is zero, is 

(a)–12 ms–1 

(b) –9 ms–1 

(c) 3 ms–1 

(d) 42 ms–1

1 Answer

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Best answer

Correct option (b)

Explanation:

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