Continue to move with uniform velocity.
Explanation
This Newton’s First Law of Motion, often referred to as the Law of Inertia. It establishes that the state of motion of an object changes only when an unbalanced external force acts upon it.Analysis:
- Newton’s First Law: It states that an object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an applied force.
- Effect of Removing Unbalanced Forces: When all unbalanced forces are removed, the net force ($F_{net}$) acting on the object becomes zero.
- Resultant Motion: According to Newton’s Second Law ($F = ma$), if the net force is zero, the acceleration ($a$) is zero. Zero acceleration means there is no change in the object's speed or direction. Consequently, the object continues to move with uniform velocity.
- Incorrect Options:
- Come to an immediate halt. is incorrect because an object comes to a halt only if a retarding force (such as friction) acts on it.
- Begin to accelerate in the reverse direction. is incorrect because acceleration (change in velocity) requires a non-zero net force.
- Move in a circular path. is incorrect because circular motion involves a continuous change in direction, which requires a centripetal force.
Key Takeaway: Force is not required to sustain motion; it is only required to change the state of motion. In the absence of net external force, an object maintains constant velocity.