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CBLconghieu
2 năm trước
Một con lắc đơn có dây treo dài 20 cm. Kéo con lắc lệch khỏi vị trí cân bằng một góc 0,1 rad rồi cung cấp cho nó vận tốc 14 cm/s hướng theo phương vuông góc sợi dây. Bỏ qua ma sát, lấy g= m/s2. Góc lệchcực đại của dây treo so với phương thẳng đứng là A. 0,141 rad. B. 0,1 rad. C. 9,97 rad. D. 0,99 rad. giúp mình với ạ,,,,sẽ vote 5 sao
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