October 2018 1 103 Report
1.keuntungan katrol tetap sebagai alat untuk..
a.arah gaya dapat diubah
b.beban menjadi lbh ringan
c.beban mudah d angkat
d.gaya yg digunakan kecil
2.pemantulan sempurna terjadi jika cahaya mengenai dinding...
a.penghalang yg halus atau rata
b.penghalang yg kasar
c.tembok
d.meja

tolong ..........................................................
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