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Soal Army.docx - 1(UN Fisika 2016 Tiga buah roda...

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1. (UN Fisika 2016) Tiga buah roda dihubungkan seperti gambar dibawah. Roda A dan roda B seporos, sedangkan roda B dan roda C dihungkan dengan sabuk. Jika R A = 2cm, R B = 4cm dan R C = 20 cm maka perbandingan kecepatan sudut roda B dan C adalah ... A. 1 : 5 B. 2 : 1 C. 2 : 5 D. 5 : 1 E. 5 : 2 2. (UN Fisika 2017) Perhatikan gambar! Jari-jari roda A = 30 cm, roda B = 40 cm, roda C = 25 cm, dan roda D = 50cm. Roda B berputar dengan kecepatan anguler 50 rad/s, kecepatan anguler roda D adalah ... A. 80 rad/s B. 60 rad/s C. 50 rad/s D. 40 rad/s E. 30 rad/s 3. (UN Fisika 2013) Gambar disamping memperlihatkan hubungan roda A, B dan C! Jari-jari roda A sama dengan roda B sebesar R. Sedangkan jari-jari roda C = 1/2R. Bila roda A diputar dengan laju konstan 10 m/s, maka kecepatan linier diroda B adalah ... A. 5 m/s B. 10 m/s C. 15 m/s D. 20 m/s E. 25 m/s 4. (UN Fisika 2012) Sebuah benda bergerak melingkar beraturan dengan jari-jari 6 meter. Jika dalam 2 menit benda itu melakukan 16 kali putaran maka kecepatan linear benda tersebut
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