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Dua vektor memiliki nilai masing-masing 30 satuan dan 40 satuan. Hitunglah resultan kedua vektor jika sudut apitnya: a.  ; b. ; c. .

Pertanyaan

Dua vektor memiliki nilai masing-masing 30 satuan dan 40 satuan. Hitunglah resultan kedua vektor jika sudut apitnya:

a. begin mathsize 14px style 0 to the power of straight omicron end style ;

b. begin mathsize 14px style 60 to the power of straight omicron end style;

c. begin mathsize 14px style 180 to the power of straight omicron end style.

  1. ...space 

  2. ...undefined 

Pembahasan Video:

Pembahasan Soal:

a. sudut apit begin mathsize 14px style 0 to the power of straight omicron end style 

begin mathsize 14px style R equals square root of A squared plus B squared plus 2 A B space cos space theta end root R equals square root of 30 squared plus 40 squared plus 2 left parenthesis 30 right parenthesis left parenthesis 40 right parenthesis left parenthesis 1 right parenthesis end root R equals square root of 4900 R equals 70 space straight N end style 

b. sudut apit begin mathsize 14px style 60 to the power of straight omicron end style

begin mathsize 14px style R equals square root of A squared plus B squared plus 2 A B space cos space theta end root R equals square root of 30 squared plus 40 squared plus 2 left parenthesis 30 right parenthesis left parenthesis 40 right parenthesis left parenthesis 0 comma 5 right parenthesis end root R equals square root of 3700 R equals 10 square root of 37 space straight N end style 

c. sudut apit begin mathsize 14px style 180 to the power of straight omicron end style 

begin mathsize 14px style R equals square root of A squared plus B squared plus 2 A B space cos space theta end root R equals square root of 30 squared plus 40 squared plus 2 left parenthesis 30 right parenthesis left parenthesis 40 right parenthesis left parenthesis negative 1 right parenthesis end root R equals square root of 100 R equals 10 space straight N end style 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 20 Juli 2021

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