When does a rigid body said to be in equilibrium? State the necessary condition for a body to be in equilibrium.

When does a rigid body said to be in equilibrium? State the necessary

1.	When does a rigid body said to be in equilibrium? State the necessary condition for a body to be in equilibrium.
Answer» SOLUTION :For translation a EQUILIBRIUM `sum F_("ext")=0` For ROTATIONAL equilibrium `sum VEC tau_(ext)=0`