Question Detail
Question
A body is in equilibrium when it is either at rest or in uniform motion. According to Newton's first law, this state of motion can only be changed by the application of which of the following?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Newton's first law of motion states that a body at rest will remain at rest, and a body in uniform motion will remain in uniform motion, unless acted upon by a resultant external force. Therefore, only a resultant force can change the equilibrium condition of a body.
Hint
Consider Newton's first law and the condition required to alter an object's state of motion.