Question

Select One Correct Option from the following: Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod length 1.4 m and of negligible mass. The rod is set rotating about an perpendicular to its length with a uniform angular speed. The point the rod through which the axis should pass in order that work for rotation of the rod is minimum, is located at a distance of
(A) 0.42 m from mass of 0.3 kg
(B) 0.70 m from mass of 0.7 kg
(C) 0.98 m from mass of 0.3 kg
(D) 0.98 m from mass of 0.7 kg.

Answer 1

Answer:

Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod of length 1.4 m and of negligible mass. Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod of length 1.4 m and of negligible mass. The rod is set rotating about an axis perpendicular to its length with a uniform angular speed