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Perhatikan gambar! Jika massa katrol dan massa ...

Perhatikan gambar!

Jika massa katrol dan massa tali diabaikan, begin mathsize 14px style italic m subscript 1 equals 2 space kg end style dan begin mathsize 14px style italic m subscript 2 equals 3 space kg space left parenthesis italic g equals 10 space begin inline style bevelled m over s squared end style right parenthesis end style. Tentukanlah percepatan sistem dan tegangan tali masing-masing benda!

  1. begin mathsize 14px style 4 space begin inline style bevelled m over s squared end style space dan space 24 space N end style 

  2. begin mathsize 14px style 2 space begin inline style bevelled m over s squared end style space dan space 20 space N end style 

  3. begin mathsize 14px style 4 space begin inline style bevelled m over s squared end style space dan space 20 space N end style 

  4. begin mathsize 14px style 2 space begin inline style bevelled m over s squared end style space dan space 24 space N end style 

  5. begin mathsize 14px style 2 space begin inline style bevelled m over s squared end style space dan space 30 space N end style 

Jawaban:

Diketahui :

begin mathsize 14px style m subscript 1 equals 2 space italic k italic g italic m subscript 2 equals 3 space kg italic g equals 10 space begin inline style bevelled m over s squared end style end style 

 

Pembahasan :

Menghitung percepatan sistem dengan meninjau seluruh sistem

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell sum F end cell equals cell italic m italic a end cell row cell W subscript 2 minus sign italic T and italic T minus sign W subscript 1 end cell equals cell left parenthesis italic m subscript 1 plus italic m subscript 2 right parenthesis italic a end cell row cell W subscript 2 bond W subscript 1 end cell equals cell left parenthesis italic m subscript 1 plus italic m subscript 2 right parenthesis italic a end cell row cell left parenthesis 3 right parenthesis left parenthesis 10 right parenthesis minus sign left parenthesis 2 right parenthesis left parenthesis 10 right parenthesis end cell equals cell left parenthesis 2 plus 3 right parenthesis italic a end cell row italic a equals cell 2 space begin inline style bevelled m over s squared end style end cell end table end style 

 

Menghitung tegangan tali dengan meninjau gaya pada benda 2

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell sum F end cell equals cell italic m italic a end cell row cell W subscript 2 minus sign italic T end cell equals cell italic m subscript 2 italic a end cell row cell left parenthesis 3 right parenthesis left parenthesis 10 right parenthesis minus sign italic T end cell equals cell left parenthesis 3 right parenthesis left parenthesis 2 right parenthesis end cell row italic T equals cell 24 space N end cell end table end style 

Jadi, jawaban yang tepat adalah D

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