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Seorang pengamat mencatat suatu kejadian pada koordinat berikut: x = 10 km; y = 5 km; z = 7 km dan t = 500 µs. Tentukan koordinat dari kejadian ini dilihat oleh seorang pengamat yang bergerak dengan kecepatan 0,8 c dalam arah x!

Seorang pengamat mencatat suatu kejadian pada koordinat berikut: x = 10 km; y = 5 km; z = 7 km dan t = 500 µs. Tentukan koordinat dari kejadian ini dilihat oleh seorang pengamat yang bergerak dengan kecepatan 0,8 c dalam arah x! 

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Y. Maghfirah

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah .

jawaban yang tepat adalah begin mathsize 14px style negative 183 comma 3 space km semicolon space 5 space km semicolon space 7 space km semicolon space 788 comma 9 space μs end style.

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Pembahasan

Diketahui: Ditanya: koordinatnya Jawab: Jadi, jawaban yang tepat adalah .

Diketahui:

begin mathsize 14px style x space equals space 10 space km y space equals space 5 space km z space equals space 7 space km t space equals space 500 space µ straight s equals 5 cross times 10 to the power of negative 4 end exponent space straight s v equals 0 comma 8 space c equals 2 comma 4 cross times 10 to the power of 5 space bevelled km over straight s end style

Ditanya: koordinatnya

Jawab:

begin mathsize 14px style table row cell x to the power of apostrophe end cell equals cell fraction numerator x minus v t over denominator square root of 1 minus v squared over c squared end root end fraction end cell row blank equals cell fraction numerator 10 minus 2 , 4 cross times 10 to the power of 5 times 5 cross times 10 to the power of negative 4 end exponent over denominator square root of 1 minus open parentheses 0 , 8 blank c close parentheses squared over c squared end root end fraction end cell row blank equals cell fraction numerator 10 minus 120 over denominator square root of 1 minus fraction numerator 0 , 64 c squared over denominator c squared end fraction end root end fraction end cell row blank equals cell fraction numerator negative 110 over denominator square root of 1 minus 0 , 64 end root end fraction end cell row blank equals cell fraction numerator negative 110 over denominator square root of 0 , 36 end root end fraction end cell row blank equals cell fraction numerator negative 110 over denominator 0 , 6 end fraction end cell row blank equals cell negative 183 , 3 blank km end cell end table end style

begin mathsize 14px style y apostrophe equals y equals space 5 space km z apostrophe equals z equals 7 space km end style

begin mathsize 14px style table row cell t to the power of apostrophe end cell equals cell fraction numerator t minus bevelled fraction numerator v x over denominator c squared end fraction over denominator square root of 1 minus v squared over c squared end root end fraction end cell row blank equals cell fraction numerator 5 cross times 10 to the power of negative 4 end exponent minus fraction numerator open parentheses 2 comma 4 cross times 10 to the power of 5 times 10 close parentheses over denominator open parentheses 3 cross times 10 to the power of 5 close parentheses squared end fraction over denominator square root of 1 minus open parentheses 0 , 8 blank c close parentheses squared over c squared end root end fraction end cell row blank equals cell fraction numerator 5 cross times 10 to the power of negative 4 end exponent minus fraction numerator open parentheses 2 comma 4 cross times 10 to the power of 6 close parentheses over denominator 9 cross times 10 to the power of 10 end fraction over denominator square root of 1 minus open parentheses 0 , 8 blank c close parentheses squared over c squared end root end fraction end cell row blank equals cell fraction numerator 5 cross times 10 to the power of negative 4 end exponent minus 0 comma 267 cross times 10 to the power of negative 4 end exponent over denominator square root of 1 minus fraction numerator 0 , 64 blank c squared over denominator c squared end fraction end root end fraction end cell row blank equals cell fraction numerator 4 comma 733 cross times 10 to the power of negative 4 end exponent over denominator square root of 1 minus 0 , 64 end root end fraction end cell row blank equals cell fraction numerator 4 comma 733 cross times 10 to the power of negative 4 end exponent over denominator square root of 0 , 36 end root end fraction end cell row blank equals cell fraction numerator 4 comma 733 cross times 10 to the power of negative 4 end exponent over denominator 0 , 6 end fraction end cell row blank equals cell 788 comma 9 blank cross times 10 to the power of negative 6 end exponent straight s end cell row blank equals cell 788 comma 9 blank mu straight s end cell end table end style 

Jadi, jawaban yang tepat adalah begin mathsize 14px style negative 183 comma 3 space km semicolon space 5 space km semicolon space 7 space km semicolon space 788 comma 9 space μs end style.

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