**Question :** The position 𝑥 of a particle varies with time 𝑡 as 𝑥 = 𝑎𝑡 2 − 𝑏𝑡3 . The acceleration of the particle will be zero at time 𝑡 equal to

(A) a/b

(B) 2a/3b

(C) a/3b

(D) zero

**Answer :** option ()

**Solution :**

with
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**Question :** The position 𝑥 of a particle varies with time 𝑡 as 𝑥 = 𝑎𝑡 2 − 𝑏𝑡3 . The acceleration of the particle will be zero at time 𝑡 equal to

(A) a/b

(B) 2a/3b

(C) a/3b

(D) zero

**Answer :** option ()

**Solution :**