GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a speed vs. time graph, a straight line shows that acceleration is
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decreasing
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increasing
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constatnt
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zero
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Explanation:
Detailed explanation-1: -If the graph is a straight line (not parallel to the x axis), the velocity is increasing uniformly i.e. the body moves with constant acceleration. The slope of the graph at any point gives the value of acceleration at that point.
Detailed explanation-2: -Constant acceleration means a horizontal line for the acceleration graph. The acceleration is the slope of the velocity graph. Constant acceleration = constant slope = straight line for the velocity graph.
Detailed explanation-3: -A straight horizontal line on a speed-time graph means that speed is constant. It is not changing over time. A straight line does not mean that the object is not moving!
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