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AP EAMCET20225 Jul 2022Morning ShiftPhysicsMathematics in PhysicsActual

The component of a vector P =3 i +4 j alog the direction ( i +2 j ) is

Options

  1. A8 5
  2. B11 5
  3. C11 2
  4. D10

Correct answer

B. 11 5

Step-by-step solution

Given, P =3 i +4 j Let Q= i +2 j The component of P along the Q is given as | P | Hence, we know that, P Q =| P || Q | |P| = P Q | Q | = (3 i +4 j ) ( i +2 j ) 1^2+2^2 = 3+8 5 = 11 5

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