The cord of length L is attached to the pin at C and passes over the two pulleys at A and D. The pulley at A is attached to the smooth collar that travels along the vertical rod. When s_B = b, the end of the cord at B is pulled downwards with a velocity v_B and is given an acceleration a_B. Determine the velocity and acceleration of the collar A at this instant. Given:

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L = 16 ft a = 3 ft b = 6 ft VB = 4 aB 3 ft S ft 2 S