The cord 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. Determine the velocity and acceleration of the end of the cord at B if at the instant s_A = b the collar is moving upwards at speed v, which is decreasing at rate a. Given:

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a = 3 ft b = 4 ft VA = -5 aA 2 = ft S 2 S