In the diagram below, block $A$ is pulled by a hand $($not shown$)$ down the ramp with a

constant speed of $10\frac{m}{s},$ what is the speed of block B$?$ Pulleys $C,D,$ and E are fixed in their

centers and they all have a radius of $50$ mm $.$ Pulley $F$ is also $50$ mm radius and its center is

in a horizontal slot so it can only move horizontally. The large moving pulley has a radius of

$100$ mm and a mass of $10$ kg $.$ The mass of $A$ is $3$ kg and the mass of $B$ is $5$ kg $.$ The coefficient

of kinetic friction on all surfaces is $0\mathrm{.}3.$ The angle theta $=45$ degrees $.$