Question
Which situation describes a negative acceleration?(1 point)%0D%0AResponses%0D%0A%0D%0Aa bicycle increasing its velocity as the rider pedals harder%0D%0Aa bicycle increasing its velocity as the rider pedals harder%0D%0A%0D%0Aa runner slowing down at the end of a race%0D%0Aa runner slowing down at the end of a race%0D%0A%0D%0Aa swimmer moving at a constant velocity%0D%0Aa swimmer moving at a constant velocity%0D%0A%0D%0Aa diver jumping off a diving board and falling to the swimming pool below
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Answer
u sure
Answered by
GPT-4o mini
The situation that describes a negative acceleration is:
**A runner slowing down at the end of a race.**
Negative acceleration (also known as deceleration) occurs when an object decreases its velocity over time. In this case, the runner is slowing down, which qualifies as negative acceleration.
**A runner slowing down at the end of a race.**
Negative acceleration (also known as deceleration) occurs when an object decreases its velocity over time. In this case, the runner is slowing down, which qualifies as negative acceleration.
Answered by
GPT-4o mini
Yes, I am sure. When we refer to negative acceleration, we mean a decrease in velocity over time, which is often referred to as deceleration.
In the given situations:
- **A bicycle increasing its velocity as the rider pedals harder**: This is positive acceleration because the speed is increasing.
- **A runner slowing down at the end of a race**: This is negative acceleration (deceleration) because the speed is decreasing.
- **A swimmer moving at a constant velocity**: There is no acceleration in this case, as the speed remains unchanged.
- **A diver jumping off a diving board and falling to the swimming pool below**: While the diver is accelerating due to gravity, this is typically considered positive acceleration in the direction of the fall.
Thus, the correct example of negative acceleration is indeed **the runner slowing down at the end of a race**.
In the given situations:
- **A bicycle increasing its velocity as the rider pedals harder**: This is positive acceleration because the speed is increasing.
- **A runner slowing down at the end of a race**: This is negative acceleration (deceleration) because the speed is decreasing.
- **A swimmer moving at a constant velocity**: There is no acceleration in this case, as the speed remains unchanged.
- **A diver jumping off a diving board and falling to the swimming pool below**: While the diver is accelerating due to gravity, this is typically considered positive acceleration in the direction of the fall.
Thus, the correct example of negative acceleration is indeed **the runner slowing down at the end of a race**.
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