Question

If a number of forces act on a rigid body, each force may be replaced by an equal parallel force acting through a fixed point, together with a couple. For the rigid body to be in equilibrium.

• A. Both resultant force and couple must be zero
• B. The resultant couple on the body must be zero
• C. The resultant force at the fixed point must be zero
• D. None of the above need be zero

Answer 1

The correct option is A Both resultant force and couple must be zero

For equilibrium resultant force as well as couple should be zero.