16-15. The disk starts from rest and is given an angular acceleration a = (5t/2) rad/s?, where t is in seconds. Determine the magnitudes of the normal and tangential components of acceleration of a point P on the rim of the disk when t = 2 s. 0.4 m

The outer radius of the spool is R = 0.65 m and the radius of the inner hub is r = 0.35 m. Determine the magnitude of the acceleration of point A if ao = {(0.4)i} m/s?, vo = {(1)i} m/s and the spool rolls without slipping. The answers are given in m/s?. Note that O and A are at the same height. A R

= At the instant shown rod AB has an angular velocity WAB 4 rad/s and an angular acceleration AB 2 rad/s2. Determine the angular velocity and angular acceleration of rod CD at this instant. The collar at C is pin connected to CD and slides freely along AB. = a) using the relative motion analysis and the contact conditions. A 4 rad/s AB= 2 rad/s² WAB 60° 0 = 0.75 m -0.5 m В B D

At the instant θ = 40 ∘, the bottom A of the L = 13 ft ladder is slipping with velocity vA = -11 ft/s and acceleration aA = -6.5 ft/s2 .  (Negative sign for: clockwise rotation, left, and down motion). Determine the velocity of end B of the ladder?   Determine the ladder's angular velocity at the given instant?   Determine the ladder's angular acceleration?   Determine the acceleration of end B?