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
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
C.
First particle cover the distance in 4 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