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Jika massa benda 2 kg dan sudut kemiringan  serta ...

Jika massa benda 2 kg dan sudut kemiringan begin mathsize 14px style 30 degree end style serta percepatan gravitasi (begin mathsize 14px style italic g equals 9 comma 8 space begin inline style bevelled m over s squared end style end style) benda akan tetap meluncur. Nilai koefisien gesekan maksimum antara benda dengan bidang miring adalah ... 

Jawaban:

Diketahui :

begin mathsize 14px style italic m equals 2 space kg italic theta equals 30 degree italic g equals 9 comma 8 space begin inline style bevelled m over s squared end style end style 

 

Pembahasan :

Ilustrasi dan garis gaya

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell sum F subscript italic y end cell equals 0 row cell N bond W space italic c italic o italic s italic theta end cell equals 0 row N equals cell W space italic c italic o italic s space 30 degree end cell row blank blank blank row cell sum F subscript italic x end cell equals 0 row cell W space italic s italic i italic n space italic theta minus sign italic f end cell equals 0 row italic f equals cell W space italic s italic i italic n space italic theta end cell row cell N italic mu end cell equals cell W space italic s italic i italic n space italic theta end cell row cell W space italic c italic o italic s space 30 degree space italic mu end cell equals cell W space italic s italic i italic n space 30 degree end cell row italic mu equals cell fraction numerator W space italic s italic i italic n space 30 degree over denominator W space italic c italic o italic s space 30 degree end fraction end cell row italic mu equals cell italic t italic a italic n space 30 degree end cell row italic mu equals cell begin inline style 1 third end style square root of 3 end cell row italic mu equals cell 0 comma 58 end cell end table end style 

Jadi, nilai koefisien gesekan maksimum sebesar 0,58

0

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