For the system shown in the figure, the string is light and pulley is frictionless. The4k block is given an upward initial velocity of \( 1 \mathrm{~m} / \mathrm{s} \). The centre of mass of the two blocks will: [neglect the impulse duration] (A) accelerate down with \( g / 3 \) (B) initially accelerate with \( \vec{g} \) and then after some time accelerate down with \( g / 3 \) (C) initially accelerate with \( \vec{g} \) and then the acceleration is o (D) initially accelerate with \( \vec{g} \) and then will accelerate down with \( g / 9 \) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live