Q:A square plate of mass 120g and edge 5.0 cm rotates about one of the edges. If it has a uniform angular acceleration of 0.2 rad/s², The torque acting on the plate is

(a) 3 × 10^{-5} N-m

(b) 2 × 10^{-5} N-m

(c) 3 × 10^{-4} N-m

(d) 3 × 10^{-4} N-m

Ans: (a)