Three sides of a square are formed by bending a rod of length 36 cm. The distance of its CG from an open end is
12 cm
None of these
D.
None of these
Let ABCD be a square whose open side is AB. As we know that CG of rod BC, DC, AD lie on the mid points E, F and H respectively.
Let w be weight of the rod.
Centre of gravity from open side = 6 + 2 = 8 cm
If the resultant of two forces of magnitude P and P acting on a particle is of magnitude P, then the angle between them is
60°
120°
90°
150°
A particle is dropped from a height 12 g metre and 4 s after anotherparticle is projected from the ground towards it with a velocity 4g ms. The time after which the second particle meets first is
4 s
2 s
1 s
A uniform ladder rests in limiting equilibrium with its lower end on a rough horizontal plane with coefficient of friction µ and its upper end against a smooth vertical wall. If is the inclination of the ladder with the wall, then is equal to