. Given . 15 /b disk resting on a 5 lb plate (rolling without A B slip) M = 40 1b - ft . Cord wrapped around 1.25 ft disk and connected to C wall D 3 ft . Moment M = 40 lb . ft on the disk as shown . MK = 0.2 between the plate and the ground . Determine . Angular acceleration of the disk . Time needed for end C of the plate to strike wallSubstitute f1 and _ into equation (3) to find e. 0 =fill in blank rad/ s2 (to 1 decimal place).