alleryStart learning →For s = t^3 - 6t^2 + 9t, at what time t (t > 0, second moment) is the particle at rest?
At = 3
Bt = 4
Ct = 1
Dt = 2
Answer & Solution
Correct answer: A. t = 3
v = 3(t - 1)(t - 3) is zero at t = 1 and t = 3, so the second rest moment is t = 3.
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