Here's what happens to the motion of an object in this scenario:
1. Initial Velocity: At the moment when the velocity is zero, the object is considered to be stationary or at rest. It has no motion.
2. Negative Acceleration: Since the acceleration is negative, it acts opposite to the direction of the object's previous motion. This means that the object starts decelerating or slowing down.
3. Change in Velocity: As the object decelerates, its velocity becomes less positive or more negative (depending on the initial direction of motion). The rate of change in velocity depends on the magnitude of the negative acceleration.
4. Reversal of Motion: If the negative acceleration is large enough, the object's velocity may eventually change sign. This means that the object starts moving in the opposite direction to its initial motion.
5. Coming to Rest: If the negative acceleration continues, the object's velocity will continue to decrease until it reaches zero again. At this point, the object comes to a complete stop.
6. Motion with Negative Velocity: If the negative acceleration persists even after the object has come to rest, the object will start moving in the opposite direction with increasing negative velocity.
In summary, when velocity is zero and acceleration is negative, the object undergoes deceleration and its motion slows down. It can eventually come to a stop and even reverse its direction of motion if the negative acceleration is significant.
