A disk spins counterclockwise and then experiences a constant clockwise angular…
PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion
Problem
A disk spins counterclockwise and then experiences a constant clockwise angular acceleration until it stops. If counterclockwise is defined as the positive direction, which of the following correctly gives the signs of the initial angular velocity ωi and the angular acceleration α during the slowing process?
(a) ωi positive, α positive
(b) ωi positive, α negative
(c) ωi negative, α positive
(d) ωi negative, α negative