AIIMS 2018 Physics Graphs of Motion MCQ Question
Assertion : The position-time graph of a uniform motion in one dimension of a body can have negative slope.
Reason : When the speed of body decreases with time, the position-time graph of the moving body has negative slope.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
A negative slope on a position-time graph indicates that the object is moving in the negative direction, while a decreasing slope signifies that the speed of the object is diminishing, indicating retardation. This aligns with the principles of kinematics, where a negative slope reflects motion towards a reference point and a decreasing slope indicates a reduction in velocity over time. Since all other options are marked as N/A, they do not provide any alternative explanations or relevant information, making option D the only viable choice. Understanding these concepts is crucial for analyzing motion and interpreting graphical data in physics.
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