PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion
Problem
Clockwise is taken as the positive sense. A flywheel initially rotates at 120 rad s⁻¹ clockwise and is brought to rest by a uniform angular retardation while turning through 480 rad. Which of the following sets correctly gives the signs of the initial angular velocity (ω₀) and angular acceleration (α) in this sign convention?
(a) ω0: positive, α: positive
(b) ω0: negative, α: positive
(c) ω0: positive, α: negative
(d) ω0: negative, α: negative