Question

A string is wrapped around a uniform solid cylinder of radius r, as shown in the figure . The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass m. Note that the positive y direction is downward and counterclockwise torques are positive.
The picture: http://www.cramster.com/answers-aug-10/physics/pulley-acceleration-string-wrapped-uniform-solid-cylinder-radiu_899208.aspx

Since the question says that CCW is positive wouldn't the net torque need to be -rT = Ialpha ? A string is wrapped around a uniform solid cylinder of radius r, as shown in the figure . The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass m. Note that the positive y direction is downward and counterclockwise torques are positive.
The picture: http://www.cramster.com/answers-aug-10/physics/pulley-acceleration-string-wrapped-uniform-solid-cylinder-radiu_899208.aspx

Since the question says that CCW is positive wouldn't the net torque need to be -rT = Ialpha ? @Physics