Final answer:
A body comes to rest when it experiences an acceleration that is opposite in direction to its initial velocity.
Step-by-step explanation:
In physics, a body comes to rest when it experiences an acceleration that is opposite in direction to its initial velocity. This means that if an object is moving in the positive direction and it acquires a constant negative acceleration, it will eventually come to rest and reverse its direction.
For example, if a car is initially moving in the positive direction, but then experiences a constant negative acceleration, such as when the brakes are applied, the car will eventually come to a stop.
This principle is governed by Newton's first law of motion, which states that a body at rest remains at rest or, if in motion, remains in motion at a constant velocity unless acted on by a net external force.
A body comes to rest when it experiences a constant acceleration in the opposite direction of its motion, as per Newton's first law of motion. This deceleration will cause the object to slow down until it stops. Calculations involving this scenario can use kinematic equations considering factors like initial velocity, final velocity, and acceleration.