A particle starts from origin O, from rest, and moves with a uniform acceleration, along the positive x−axis. Identify all figures that correctly represent the motion qualitatively (a= acceleration, v= velocity, x=displacement, t= time)
A
(A)
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B
(A), (B), (D)
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C
(A), (B), (C)
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D
(B), (C)
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Solution
The correct option is B(A), (B), (D) For constant acceleration, the a−t graph is a straight line and parallel to the time axis.
The v−t graph will be a straight line passing through origin (asu=0) and the slope of the line will be equal to acceleration.
The x−t graph will be a parabola, indicating that the displacement is positive and increases non-linearly with time.
The graphs depicted in diagrams (A), (B) and (D) are correctly representing the above points.