beth238433 beth238433
  • 14-07-2019
  • Physics
contestada

If a vector 2ỉ +3j +8k is perpendicular to the
vector 4j-4i + ak, then the value of a is

Respuesta :

zumar
zumar zumar
  • 14-07-2019

Explanation:

if two vectors are perpendicular to each other then thier dot product is equal to zero so (2i+3j+8k).(-4i+4j+ak)=0 (2)(-4) +(3)(4)+(8)(a) =0 -8+12+8a=0 4+8a=0 8a=-4

[tex]a = \frac{ - 4}{8} [/tex]

[tex]a = \frac{ - 1}{2} [/tex]

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