The necessary condition of equilibrium of a body is-
∑Fx = 0, ∑Εy = 0, ∑Μ = 0
In 2D, this typically means the sum of moments about a single point in the plane is zero (\sum \Mu = 0). The term \sum \Epsilon_y = 0 appears to be a typo and likely intended to represent \sum F_y = 0, which is the condition for translational equilibrium in the y-direction. Therefore, the correct answer is ∑Fx = 0, ∑Εy = 0, ∑Μ = 0.
Important Questions from Equilibrium and Friction
If in a planar system, only 2 reaction forces are acting, then the system is:-
By applying the static equations i.e. ∑H = 0, ∑V = 0 and ∑M = 0. To a determine structure, we may determine:
Which of the following is not a type of equilibrium?
Varingon’s theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then
A block of mass 4√2 kg is at rest on the inclined plane. The inclined plane is inclined at an angle of 135° from horizontal direction in anticlockwise direction. Determine the coefficient of friction so that block can start slide in downward direction, assume the acceleration of gravity as 10 m/s2.
