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Jika Doni mendorong sistem tersebut dengan gaya F ...

Jika Doni mendorong sistem tersebut dengan gaya F sebesar 40 N, percepatan sistem tersebut sebesar .... space 

  1. begin mathsize 14px style 1 comma 5 space straight m divided by straight s squared end style 

  2. begin mathsize 14px style 2 comma 0 space straight m divided by straight s squared end style 

  3. begin mathsize 14px style 2 comma 5 space straight m divided by straight s squared end style 

  4. begin mathsize 14px style 3 comma 0 space straight m divided by straight s squared end style 

  5. begin mathsize 14px style 3 comma 5 space straight m divided by straight s squared end style 

Jawaban:

Soal ini terdapat keterangan tambahan gambar:

begin mathsize 14px style m subscript A equals 6 space kg m subscript B equals 2 space kg m subscript C equals 8 space kg end style 

Tinjau gaya benda A:

begin mathsize 14px style begin inline style sum for space of end style F equals m subscript A a T subscript 1 equals m subscript A a end style 

Tinjau gaya benda B:

begin mathsize 14px style begin inline style sum for space of F equals m subscript B a T subscript 2 minus T subscript 1 equals m subscript B a T subscript 2 minus m subscript A a equals m subscript B a T subscript 2 equals m subscript A a plus m subscript B a end style end style 

Tinjau gaya benda C:

begin mathsize 14px style begin inline style sum for space of end style begin inline style F end style begin inline style equals end style begin inline style m subscript C end style begin inline style a end style F begin inline style minus end style begin inline style T subscript 2 end style begin inline style equals end style begin inline style m subscript C end style begin inline style a end style F begin inline style minus end style begin inline style m subscript A end style begin inline style a end style begin inline style minus end style begin inline style m subscript B end style begin inline style a end style begin inline style equals end style begin inline style m subscript C end style begin inline style a end style F begin inline style equals end style begin inline style m subscript A end style begin inline style a end style begin inline style plus end style begin inline style m subscript B end style begin inline style a end style begin inline style plus end style begin inline style m subscript C end style begin inline style a end style begin inline style a end style begin inline style equals end style fraction numerator F over denominator m subscript A plus m subscript B plus m subscript C end fraction begin inline style a end style begin inline style equals end style fraction numerator 40 over denominator 6 plus 2 plus 8 end fraction a begin inline style equals end style begin inline style 2 end style begin inline style comma end style begin inline style 5 end style begin inline style space end style begin inline style straight m end style begin inline style divided by end style begin inline style straight s squared end style end style  

Jadi, jawaban yang benar adalah C.

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