Please see the image below. The answer must be in 4 decimal places. Thank you.
Subject: Dynamics RB
Extracted text: The two attached pulleys are driven by the belt with increasing speed. When the belt reaches a speed v 1 ft/sec, the total acceleration of point Pis 40 ft/sec?. For this instant determine the angular acceleration a of the pulleys in rad/sec. 8" B P 8