An equilateral triangular frame is made of three thin massless rods. Three point masses of mass m each are fixed at vertices of the frame as shown. The system is rotated with uniform angular speed ω a

Question

An equilateral triangular frame is made of three thin massless rods. Three point masses of mass $m$ each are fixed at vertices of the frame as shown. The system is rotated with uniform angular speed $ω$ about an (fixed) axis passing through $A$ and normal to plane of triangular frame. Neglect the effect of gravity. The tension in rod connecting mass $B$ and $C$ is -

TestHub · Accepted Answer

B moves in dotted circle of radius l with uniform speed. Massless rod 1 can exert force T 1 on B only along its length. Hence T 1 contributes only to centripetal acceleration of B . The tension in rod 2, that is, T 2 can contribute to both tangential and centripetal acceleration of B . Since tangential acceleration of B is zero. Hence T 2 = 0 .

Physics - Rotation Question with Solution | TestHub

Options:

Doubts & Discussion