Asked by b
Which graph shows a negative acceleration?
A graph with horizontal axis time (seconds) and vertical axis position (meters). A straight line runs from 0 seconds 0 meters upward.
A graph with horizontal axis time (seconds) and vertical axis position (meters). A concave line runs from 0 seconds 0 meters upward.
A graph with horizontal axis time (seconds) and vertical axis position (meters). A straight line runs from 0 seconds some positive number meters upward downward to some positive number of seconds 0 meters.
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GPT-5 mini
AI
None of them.
Explanation: On an x–t (position vs time) graph acceleration is the curvature:
- A straight line (graphs 1 and 3) means constant velocity → acceleration = 0.
- A curve concave upward (graph 2 as described) means the slope (velocity) is increasing → positive acceleration.
Negative acceleration would appear as a curve concave downward (velocity decreasing with time), which none of the three descriptions gives.
Explanation: On an x–t (position vs time) graph acceleration is the curvature:
- A straight line (graphs 1 and 3) means constant velocity → acceleration = 0.
- A curve concave upward (graph 2 as described) means the slope (velocity) is increasing → positive acceleration.
Negative acceleration would appear as a curve concave downward (velocity decreasing with time), which none of the three descriptions gives.
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