A metre stick of mass 400 g is pivoted at one end and displaced through an angular 60°. The increase in its potential energy is

Q: A metre stick of mass 400 g is pivoted at one end and displaced through an angular 60°. The increase in its potential energy is

(a) 2 J

(b) 3 J

(c) 0 J

(d) 1 J

Ans: (d)