November 2018 1 25 Report
Seorang anak menarik mobil mainan menggunakan tali dngan gya sbesar 20 N.Tali tsbut membentuk sdut 30° trhadap prmukaan tnah.jika mbil mainan brpindah sjauh 10 m,brapakah usaha yg dlakukan anak itu
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