At a certain instant a moving object comes to momentary rest. Is it accelerating at that moment?

possibly. Just because its instantaneous velocity is zero does not alter the forces acting on it, so there may still be acceleration.

YES

If a moving object comes to a momentary rest, it means that its velocity becomes zero momentarily. To determine if the object is accelerating at that moment, we need to consider its acceleration.

Acceleration is the rate of change of velocity. If an object has a changing velocity, it means it is accelerating. However, at the moment the object comes to rest, its velocity is zero, which implies that there is no change in velocity. Therefore, the object is not accelerating at that moment.

To determine if an object is accelerating at a certain instant when it comes to momentary rest, we need to know its acceleration at that specific moment. Acceleration is the rate at which an object's velocity changes over time.

If an object comes to momentary rest, it means its velocity becomes zero at that moment. However, the object could still be accelerating if its velocity is changing at that instant. In this case, the acceleration could be due to slowing down or changing direction.

To determine if the object is accelerating, we need to analyze its motion over a period of time leading up to the moment when it comes to rest. If the object's velocity is changing during that time, it means it is accelerating. However, if the velocity remains constant or is already zero before coming to rest, then the object is not accelerating during that specific instant.

In summary, an object is accelerating at the moment it comes to rest if its velocity is changing during that time.