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
Answers
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.
u sure
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**.