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Alasan Mengapa Dengan Bantuan Roda, Mendorong Beban Menjadi Lebih Ringan

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Pernah tidak menggunakan kereta sorong untuk mengangkut pasir, tanah atau benda lain diatasnya? Rasanya gimana??

Lebih mudah didorong kan??

source : pixabay

Kehadiran roda membuat pekerjaan lebih mudah, mengangkat pasir sekereta penuh, seperti gambar diatas, jauh lebih ringan.
Tidak terlalu berat.


Mengapa lebih mudah?

Jika pasir sekereta penuh, seperti gambar diatas, diangkat menggunakan tangan, pastinya bakalan berat banget. Mungkin kita tidak kuat bahkan untuk membuat kereta itu sekedar menjinjit.

Tapi jika didorong dengan roda jauh lebih enteng.

Mengapa?

Itu semua terjadi berkat gaya kontak roda dengan permukaan lantai atau tanah sangat kecil, sehingga memperkecil gaya gesek yang terjadi.

Jika gaya gesek besar, kita akan kesulitan mendorong suatu benda mengingat benda tersebut mengcengkram lantai dengan kuat.

Berkat roda, gaya gesek melunak..
Nilainya jauh lebih kecil.



Mengapa gaya gesek lebih kecil berkat roda


Gaya gesek sangat dipengaruhi oleh luas permukaan benda yang menyentuh lantai atau tanah. Semakin besar luas yang bersentuhan, semakin besar pula gaya yang diperlukan untuk mendorongnya.

Apalagi jika mendorongnya ditanah.

Tanah sangat kasar dan pastinya membuat kita harus mengerahkan tenaga lebih kuat lagi untuk mendorong benda diatasnya.


Tapi dengan kehadiran roda, kereta memiliki bidang sentuh yang sangat kecil dengan tanah, akibatnya gaya gesek pun kecil.

Tenaga yang diperlukan pun lebih kecil.

Terus roda memiliki keuntungan lain.
Yaitu karena bentuk bundarnya.

Bentuk yang bundar membuat roda mampu menggelinding mulus dengan lancar diatas tanah, sehingga kita bisa mendorongnya dengan mudah.
Setiap permukaan roda mempunyai jarak yang sama ke titik pusatnya.

Ini keuntungan roda.

Coba jika rodanya berbentuk kotak atau segitiga. Bisa dipastikan roda susah menggelinding dan hanya membuat kita kesusahan mendorongnya.


Roda termasuk pesawat sederhana

Dalam pelajaran IPA SD atau SMP, roda termasuk ke dalam salah satu pesawat sederhana dalam kehidupan sehari-hari.

Pesawat sederhana adalah alat yang memudahkan pekerjaan kita.

Roda salah satunya.

Kehadirannya mampu membuat pekerjaan dorong-mendorong beban menggunakan kereta sorong menjadi lebih enteng.
Lebih mudah.

Sehingga tidak heran jika kereta ini menjadi barang wajib yang harus dimiliki para tukang bangunan ketika ingin cepat menuntaskan pekerjaan.

Beban yang dibawa bisa lebih banyak tapi dengan keluaran tenaga yang lebih sedikit.

Roda membuat gaya sentuh dengan tanah atau lantai menjadi semakin kecil dan bentuknya yang bundar membuatnya mampu menggelinding sempurna. Sehingga tidak menimbulkan guncangan keras ketika melaju.



Keuntungan menggunakan roda :

  • Roda membuat gaya sentuh dengan tanah atau lantai menjadi semakin kecil, sehingga gaya gesek kecil dan membuat kita mengeluarkan tenaga yang lebih kecil untuk mendorongnya.
  • Bentuknya yang bundar membuatnya mampu menggelinding sempurna. Sehingga tidak menimbulkan guncangan keras ketika melaju.



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