ABC is a right angled triangular plate of uniform thickness. The sides are such that AB > BC as shown in figure. I1 , I2, I3 are moments of inertia about AB, BC and AC respectively. Then which of the following relations is correct ?
O is the centre of an equilateral triangle ABC. F1, F2 and F3 are three forces acting along the side AB, BC and AC as shown in figure. What should be the magnitude of F3. So that the total torque about O is zero ?
( F1 + F2 ) /2
( F1 - F2 )
(F1 + F2 )
2 (F1 + F2 )
A uniform rod of length l and mass m is free to rotate in a vertical plane about A. The rod initially in horizontal position is released. The initial angular acceleration of the rod is (Moment of inertia of rod about A is ml2/3)
3g/2l
Two bodies of mass 1 kg and 3 kg have position vectors respectively. The centre of mass of this system has a position vector
MLω2
