Roboguru

Perhatikan grafik berikut ini Jika massa benda A,B dan C berturut-turut 2 kg, 4 kg, dan 6 kg, pernyataan yang benar adalah....

Pertanyaan

Perhatikan grafik berikut ini


Jika massa benda A,B dan C berturut-turut 2 kg, 4 kg, dan 6 kg, pernyataan yang benar adalah....

  1. Usaha benda A lebih kecil daripada usaha benda B

  2. Usaha benda A lebih kecil daripada usaha benda C

  3. Usaha benda A lebih besar daripada usaha benda C

  4. Usaha benda B sama besar dengan usaha benda A

  5. Usaha benda B sama besar dengan usaha benda C

Pembahasan Video:

Pembahasan Soal:

Diketahui:
table attributes columnalign right center left columnspacing 0px end attributes row cell m subscript A end cell equals cell 2 kg end cell row cell straight m subscript B end cell equals cell 4 kg end cell row cell straight m subscript straight C end cell equals cell 6 kg end cell row cell v subscript A apostrophe end cell equals cell 30 bevelled fraction numerator space straight m over denominator straight s end fraction end cell row cell v subscript A end cell equals cell 0 space bevelled fraction numerator space straight m over denominator straight s end fraction end cell row cell v subscript B apostrophe end cell equals cell 25 bevelled fraction numerator space straight m over denominator straight s end fraction end cell row cell v subscript B end cell equals cell 5 space bevelled fraction numerator space straight m over denominator straight s end fraction end cell row cell v subscript C apostrophe end cell equals cell 20 bevelled fraction numerator space straight m over denominator straight s end fraction end cell row cell straight v subscript straight C end cell equals cell 10 space bevelled fraction numerator space straight m over denominator straight s end fraction end cell end table 

Ditanya:

W equals increment E subscript k equals... ? 

Dijawab:

table attributes columnalign right center left columnspacing 0px end attributes row W equals cell increment E subscript k end cell row W equals cell 1 half times m times increment v end cell row W equals cell 1 half times m times open parentheses v apostrophe squared minus v squared close parentheses end cell row blank blank blank row cell W subscript A end cell equals cell increment E subscript k A end subscript end cell row cell W subscript A end cell equals cell 1 half times m times increment v subscript A end cell row cell W subscript A end cell equals cell 1 half times m times open parentheses v subscript A apostrophe squared minus v subscript A squared close parentheses end cell row cell W subscript A end cell equals cell 1 half times 2 kg times open parentheses open parentheses 30 space bevelled straight m over straight s close parentheses squared minus open parentheses 0 space bevelled straight m over straight s close parentheses squared close parentheses end cell row cell W subscript A end cell equals cell 1 half times 2 kg times open parentheses 900 bevelled fraction numerator space straight m squared over denominator straight s squared end fraction minus 0 bevelled fraction numerator space straight m squared over denominator straight s squared end fraction close parentheses end cell row cell W subscript A end cell equals cell 900 space straight J end cell row blank blank blank row cell straight W subscript straight B end cell equals cell increment straight E subscript kB end cell row cell straight W subscript straight B end cell equals cell 1 half times straight m times increment straight v subscript straight B end cell row cell straight W subscript straight B end cell equals cell 1 half times straight m times open parentheses straight v subscript straight B apostrophe squared minus straight v subscript straight B squared close parentheses end cell row cell straight W subscript straight B end cell equals cell 1 half times 4 kg times open parentheses open parentheses 25 space bevelled straight m over straight s close parentheses squared minus open parentheses 5 space bevelled straight m over straight s close parentheses squared close parentheses end cell row cell straight W subscript straight B end cell equals cell 1 half times 4 kg times open parentheses 625 bevelled fraction numerator space straight m squared over denominator straight s squared end fraction minus 25 bevelled fraction numerator space straight m squared over denominator straight s squared end fraction close parentheses end cell row cell straight W subscript straight B end cell equals cell 1200 space straight J end cell row blank blank blank row cell straight W subscript straight C end cell equals cell increment straight E subscript kC end cell row cell straight W subscript straight C end cell equals cell 1 half times straight m times increment straight v subscript straight C end cell row cell straight W subscript straight C end cell equals cell 1 half times straight m times open parentheses straight v subscript straight C apostrophe squared minus straight v subscript straight C squared close parentheses end cell row cell straight W subscript straight C end cell equals cell 1 half times 6 kg times open parentheses open parentheses 20 space bevelled straight m over straight s close parentheses squared minus open parentheses 10 space bevelled straight m over straight s close parentheses squared close parentheses end cell row cell straight W subscript straight C end cell equals cell 1 half times 6 kg times open parentheses 400 bevelled fraction numerator space straight m squared over denominator straight s squared end fraction minus 100 bevelled fraction numerator space straight m squared over denominator straight s squared end fraction close parentheses end cell row cell straight W subscript straight C end cell equals cell 900 space straight J end cell end table  

Dari perhitungan Usaha diatas dapat disimpulkan bahwa Usaha benda A lebih kecil daripada Usaha benda BUsaha benda C lebih kecil daripada Usaha benda B dan Usaha benda A dan benda C sama besar.
Jadi pernyataan yang benar ada pada opsi A

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 18 Juli 2021

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ikuti Kami

©2021 Ruangguru. All Rights Reserved