Question

multiple select question
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the plot depicts the position versus time of a toy car in one dimension. during which time interval(s) is the car going backward?
□ 6–8 seconds
□ 2–4 seconds
□ 8–10 seconds
□ 4–6 seconds
□ 0–2 seconds
□ none, the car depicted here does not go backwards

Explanation:

On a position-time graph, a car moves backward when position decreases as time increases (negative slope).

• 6-8 seconds: Position stays constant (no motion).
• 2-4 seconds: Position decreases from ~4m to lower value (negative slope, backward motion).
• 8-10 seconds: Position decreases from ~4m to 0 (negative slope, backward motion).
• 4-6 seconds: Position increases (positive slope, forward motion).
• 0-2 seconds: Position increases (positive slope, forward motion).

Answer:

• 2-4 seconds
• 8-10 seconds