Roboguru

Pertanyaan

Perhatikan 2 vektor dibawah ini!

 

Besar resultan kedua vektor tersebut adalah ....

  1. begin mathsize 14px style 10 square root of 7 space straight N end style 

  2. begin mathsize 14px style 10 square root of 2 space straight N end style 

  3. begin mathsize 14px style 10 square root of 3 space straight N end style 

  4. begin mathsize 14px style 10 space straight N end style 

  5. begin mathsize 14px style 20 space straight N end style 

M. Robo

Master Teacher

Jawaban terverifikasi

Pembahasan

Resultan vektor dapat dicari dengan persamaan

begin mathsize 14px style open vertical bar R with rightwards arrow on top close vertical bar equals square root of open vertical bar A with rightwards arrow on top close vertical bar squared plus open vertical bar B with rightwards arrow on top close vertical bar squared plus 2 open vertical bar A with rightwards arrow on top close vertical bar open vertical bar B with rightwards arrow on top close vertical bar cos invisible function application theta end root end style      

dengan A dan B adalah besar vektor pertama dan kedua, dan teta adalah sudut yang diapit kedua vektor. Maka

begin mathsize 14px style vertical line R with rightwards arrow on top vertical line equals square root of vertical line A with rightwards arrow on top vertical line squared plus vertical line B with rightwards arrow on top vertical line squared plus 2 vertical line A with rightwards arrow on top vertical line vertical line B with rightwards arrow on top vertical line cos space 60 to the power of straight o end root vertical line R with rightwards arrow on top vertical line equals square root of left parenthesis 10 right parenthesis squared plus left parenthesis 20 right parenthesis squared plus 2 left parenthesis 10 right parenthesis left parenthesis 20 right parenthesis left parenthesis 0 , 5 right parenthesis end root vertical line R with rightwards arrow on top vertical line equals square root of 700 vertical line R with rightwards arrow on top vertical line equals 10 square root of 7 blank straight N end style         

Jadi, jawaban yang tepat adalah A.

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Pertanyaan serupa

Perhatikan kedua vektor berikut ini!     Selisih kedua vektor tersebut adalah ….

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Jawaban terverifikasi

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