Constant acceleration is a change in speed that does not vary over time. If an automobile raises its speed by 20 mph in one minute, then by an additional 20 mph the next, it's moving at high remains constant as 20 mph per minute, and the further discussion can be defined as follows:
- When such speed of an item is constant - it's doesn't increase or decrease - we say it is traveling at a constant speed.
- Since the acceleration (a) is uniform as well as the force F=ma, the force is constant but just not zero.
Therefore the answer is "Option d"
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