What are the signs of the angular velocity ω and angular acceleration α of the pulley in case (a)? by convention, clockwise rotations are negative and counterclockwise rotations are positive. what are the signs of the angular velocity and angular acceleration of the pulley in case (a)? by convention, clockwise rotations are negative and counterclockwise rotations are positive. ω> 0, α> 0 ω< 0, α> 0 ω> 0, α< 0 ω< 0, α< 0