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2. motion in straight line — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics2. motion in straight line1 Mark
MCQ
$Assertion$ : Velocity-time graph for an object in uniform motion along a straight path is a straight line parallel to the time axis.

$Reason$ : In uniform motion of an object velocity increases as the square of time elapsed.

  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • ✓
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: C.
If the Assertion is correct but Reason is incorrect.
c
In uniform motion the object moves with uniform velocity, the magnitude of its velocity at different instance i.e., at $t = 0, t =1, sec, t = 2\,sec .....$ will always be constant. Thus velocity-time graph for an object in uniform motion along a straight path is a straight line parallel to time axis.

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