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Question

Impulse is
  1. a scalar quantity
  2. a vector quantity
  3. neither a scalar nor a vector
  4. sometimes a scalar and sometimes a vector

A
a scalar quantity
B
neither a scalar nor a vector
C
sometimes a scalar and sometimes a vector
D
a vector quantity
Solution
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Impulse is a vector quantity as it has both magnitude as well as direction.
Mathematically, impulse is equal to the change of momentum of the body.
I=PfinalPinitial

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