Q144 / 180 · AIIMS 2019 (26 May) · Physics

Assertion : A rocket moves forward by pushing the surrounding air backwards. Reason : It derives the necessary thrust to move forward according to Newton's third la

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • 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

A rocket moves forward taking the help of reaction force. For that it has to exert a force on the surrounding air so that it receives reaction force as per Newton's third law.

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

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