Question : A particle moves along a straight line such that its displacement at any time 𝑡 is given by 𝑆 = 𝑡 3 − 6𝑡2 + 3𝑡 + 4 𝑚𝑒𝑡𝑟𝑒𝑠 The velocity when the acceleration is zero is
(A) 3ms^{-1}
(B) -12ms^{-1}
(C) 42ms^{-1}
(D) -9ms^{-1}
Answer : option (D)
Solution :
