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Question
Consider the following five graphs (note the axis carefully). Which of the following represents motion at constant speed?
(A) 
(B)
(C)
(D)
(E)
Consider the following five graphs (note the axis carefully). Which of the following represents motion at constant speed?
(A) (B)
(C)
(D)
(E)
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Solution
The correct option is D A and D
From graphs A, we can see that the graph has a constant slope. In a distance-time graph, a constant slope graph is due to constant speed. In Graph D, the velocity is constant with respect to time.
In Graph B, the velocity is increasing uniformly and not constant. In the graph, C the acceleration is increasing constantly and hence velocity will not be constant. In the graph, E the acceleration is constant and therefore, velocity again will not be constant.
Therefore, option d is correct.
From graphs A, we can see that the graph has a constant slope. In a distance-time graph, a constant slope graph is due to constant speed. In Graph D, the velocity is constant with respect to time.
In Graph B, the velocity is increasing uniformly and not constant. In the graph, C the acceleration is increasing constantly and hence velocity will not be constant. In the graph, E the acceleration is constant and therefore, velocity again will not be constant.
Therefore, option d is correct.
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