If the resultant of all the forces acting on a body is _______, then the body is said to be in equilibrium.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Zero
A body is in equilibrium when the forces on it balance, so that their resultant (net force) is zero. By Newton’s first law, it then has no acceleration: a body at rest stays at rest, and a moving body keeps moving with the same velocity. A book lying on a table is an example: its weight downwards is balanced by the upward push of the table.