Q1: If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along

ANS:B - the same line in opposite sense

If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along: "the same line in opposite sense." When two forces are in equilibrium, it means that their vector sum is zero. For this to happen, the forces must balance each other out completely. This requires that the forces have equal magnitudes but act in opposite directions along the same line.