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Sebuah balok yang beratnya 150 newton ditarik di atas bidang miring dengan gaya f seperti pada gambar besarnya gaya f adalah

Sebuah balok yang beratnya 150 newton ditarik di atas bidang miring dengan gaya f seperti pada gambar besarnya gaya f adalah

Diketahui:
w = 150 N
a = 4 m
h = 3 m
Ditanya: F = …?
Jawaban:
Pada bidang miring, kita dapat menghitung gaya yang dipelukan dengan persamaan:
F equals fraction numerator w cross times h over denominator s end fraction
dimana,
F = gaya yang diberikan (N)
w = gaya berat benda (N)
h = tinggi bidang miring (m)
s = panjang bidang miring (m)
Yang dimaksud panjang bidang miring adalah sisi miring pada bidang miring tersebut. Karena pada soal belum diketahui, maka kita hitung dulu panjang bidang miringnya dengan menggunakan persamaan pythagoras.
table attributes columnalign right center left columnspacing 0px end attributes row s equals cell square root of a squared plus h squared end root end cell row s equals cell square root of 4 squared plus 3 squared end root end cell row s equals cell square root of 16 plus 9 end root end cell row s equals cell square root of 25 end cell row s equals cell 5 space straight m end cell end table
Maka,
table attributes columnalign right center left columnspacing 0px end attributes row F equals cell fraction numerator w cross times h over denominator s end fraction end cell row F equals cell fraction numerator 150 space straight N cross times 3 space straight m over denominator 5 space straight m end fraction end cell row F equals cell 90 space straight N end cell end table
Dengan demikian, besar gaya yang diperlukan adalah 90 Newton.

 

 

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