Solution

Engineering Mechanics (Dynamics)

Chapter 12

Exercise 211

Position Coordinates. The position of roller A and block B are specified by 

position coordinates xA and yB respectively as shown in Fig. a. We can relate these 

two position coordinates by considering the length of the cable, which is constant.

Answer

$2.4$ m/s, up. $a_B = 3.25$ m/s$^2$, up.