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Massa bumi  kg dan massa bulan kg. Jarak bumi bula...

Massa bumi begin mathsize 14px style 5 comma 98 cross times 10 to the power of 24 end style kg dan massa bulan begin mathsize 14px style 7 comma 35 cross times 10 to the power of 22 end stylekg. Jarak bumi bulan adalah begin mathsize 14px style 3 comma 84 cross times 10 to the power of 8 end style m. Kuat medan gravitasi bulan pada bumi adalah ...

  1. begin mathsize 14px style 1 comma 5 cross times 10 to the power of negative 3 end exponent space text N/kg end text end style 

  2. begin mathsize 14px style 2 comma 4 cross times 10 to the power of negative 2 end exponent space text N/kg end text end style 

  3. begin mathsize 14px style 2 comma 7 cross times 10 to the power of negative 3 end exponent space text N/kg end text end style 

  4. begin mathsize 14px style 3 comma 2 cross times 10 to the power of negative 3 end exponent space text N/kg end text end style 

  5. begin mathsize 14px style 4 comma 1 cross times 10 to the power of negative 3 end exponent space text N/kg end text end style 

Jawaban:

Diketahui

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row M equals cell 5 comma 98 cross times 10 to the power of 24 space text kg end text end cell row cell m subscript b u l a n end subscript end cell equals cell 7 comma 35 cross times 10 to the power of 22 space text kg end text end cell row cell R subscript b u m i end subscript end cell equals cell 3 comma 84 cross times 10 to the power of 8 space text m end text end cell end table end style  

Besar kuat medan gravitasi bulan pada bumi berarti kuat medan gravitasi di bulan oleh bumi. Sehingga besarnya adalah:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row E equals cell fraction numerator G M over denominator r squared end fraction end cell row blank equals cell fraction numerator open parentheses 6 comma 67 cross times 10 to the power of negative 11 end exponent close parentheses open parentheses 5 comma 98 cross times 10 to the power of 24 close parentheses over denominator open parentheses 3 comma 84 cross times 10 to the power of 8 close parentheses squared end fraction end cell row blank equals cell fraction numerator 39 comma 8866 cross times 10 to the power of 13 over denominator 14 comma 7456 cross times 10 to the power of 16 end fraction end cell row blank equals cell 2 comma 7 cross times 10 to the power of negative 3 end exponent space text N/kg end text end cell end table end style 

Jadi, jawaban yang tepat adalah C.

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