Q136 / 180 · AIIMS 2018 (26 May) · Physics

Assertion : For a given time interval, average velocity is single valued while average speed can have many values. Reason : Velocity is a vector quantity and speed is a scalar quantity.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • Correct answer
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

For a given interval of time, the body in motion may go from one position to another through different paths, where displacement in a given time has one value but distance travelled can have many values. Due to which, assertion is correct. The reason is also correct but not a true explanation of assertion.

Hence, the correct answer is option: 'B'.

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