The spool of tape shown and its frame assembly are pulled upward at a speed vA = 100mm/s. Knowing that end B of the tape is pulled downward with a velocity of 300 mm/s 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 velocity of Point D of the spool.

Transcribed Image Text:

80 mm Ny