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A particle moves in the X-Y plane under the influence of a force such that its linear momentum is p (t)=A[ i k t- j k t] , where A and k are constants. The angle between the force and the momentum is

Options

  1. A0^
  2. B30^
  3. C45^
  4. D90^

Correct answer

D. 90^

Step-by-step solution

aligned & F = d p d t =-k A k t i -k A k t j & p =A k t i -A k j aligned Since, F p =0 Angle between F and pshould be 90^ . Correct option is ( d ) .

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