Statics and Dyn...

Let ABC be an equilateral triangle formed by weightless inextensible strings, the side AB is horizontal. A and B are tied to fixed points D and E by equal weightless inextensible strings AD, BE, a weight of W gram is attached at C. The angles DAB, ABE are each 150°. Then,which of the following statements is correct?

The maximum and minimum magnitude of resultants of two forces are P₁ and P₂ , respectively. The magnitude of the resultant, when two forces are at a right angles, is

The greatest and the least magnitudes of the resultant of two forces of constant magnitudes are F and G . When the forces act at an angle 2α , the magnitude of the resultant is

If forces of magnitudes 12 kg-W, 5 kg-W and 13 kg-W act at a point are in equilibrium, then the angle between the first two forces is

With two forces acting at a point, the maximum effect is obtained when their resultant is 4 N. If they act at right angles, then their resultant is 3N. Then, the forces are

The resultant R of two forces P and Q act at right angles to P. Then, the angle between the forces is

The resultant R of two forces acting on a particle is at right angles to one of them and its magnitude is one-third of the other force. The ratio of larger force to smaller one is