Question

21 System of forces acting upon a rigid body is in equilibrium if --
(A)Force sum vanishes
(B)moment sum vanishes
(D)None of these.
(C)force sum and moment sum
vanishes separately​

Answer 1

Step-by-step explanation:

If the total force on a rigid body is zero then the body shows translational equilibrium as the linear momentum remains unchanged despite the change in time: If the total torque on a rigid body is zero then the body shows rotational equilibrium as the angular momentum does not change with time.