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The velocity-time graph for a body with non-uniform motion (assume non- constant acceleration) is a:

1. straight line making some angle with the positive \( x \) axis.
2. straight line parallel to x-axis.
3. straight line parallel to y-axis
4. curved line

Correct answer: curved line

Solution

On a velocity-time graph, the slope represents acceleration. If acceleration is non-constant, the slope must change from point to point, so the graph cannot be a straight line. Therefore, it must be a curved line.

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