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GK QUESTION#3015

Assertion (A): For a constant force, impulse equals the force multiplied by its time of action. Reason (R): Impulse is the product of pressure and time. Choose the correct option.

  1. ABoth A and R are true, and R is the correct explanation of A.
  2. BBoth A and R are true, but R is not the correct explanation of A.
  3. CA is true, but R is false.Correct answer
  4. DA is false, but R is true.
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Answer

C. A is true, but R is false.

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Explanation

Impulse is the time integral of force. For a constant force its value is force multiplied by the time interval, equal to the momentum change. Pressure multiplied by time has different dimensions and is not impulse. A force acting briefly is an impulsive force; impulse is the momentum transferred.

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