A light string is wrapped around a uniform solid cylinder of mass 2.0kg and radius 0.10m that rests on a horizontal table. The string passes over a frictionless pulley and is attached to a 1.0kg block hanging vertically. The table is rough enough so the cylinder rolls without slipping when the block is released. What is the magnitude of the block’s acceleration?
a) 3.9m/s2
b) 5.6m/s2
c) 4.9m/s2
d) 2.5m/s2