The spool of tape shown and its frame assembly are pulled upward at a speed vA = 750 mm/s. Knowing that the 80-mm-radius spool has an angular velocity of 15 rad/s clockwise and that at the instant shown the total thickness of the tape on the spool is 20 mm, determine 

(a) The instantaneous center of rotation of the spool, 

(b) The velocities of Points B and D.

Transcribed Image Text:

90 mm