81. If the angular distance, 0 = 2t3 – 3t2, the angular acceleration at t = 1 sec. is__________________? September 7, 2025 by Admin A. 1 rad/sec2 B. 4 rad/sec2 C. 6 rad/sec2 D. 12 rad/sec2 ✅ The correct answer is option C.
