Question

What is an equilibrant?
A.an added force that produces equilibrium
B.the reaction force in an action-reaction pair of forces
C.an object with forces equal in magnitude and direction
D.an object that has no net force acting on it

Answer 1

D an object that has no netforce acting on it. Because it may be an object is at rest or at a constant velocity
Hope this helps

Answer 2

The equilibrant, also known as the counterbalancer in a force system, is an equal but opposite force that produces equilibrium. It acts against the resultant force to keep a body motionless. Suppose we have a 20kg mass on one end of a swing and nothing on the other. The swing will be titled unevenly because no force balances the 20kg weight. On the other hand suppose a weight of 40kg rest on the other end. This force doesn't produce equilibrium either because it isn't equal to the 20kg weight; the swing would tilt towards the weight of larger mass. A 20kg mass will balance the system. Hence the force which balances other forces, thus bringing an object to equilibrium is the equilbrant.