Physics, 15.06.2021 14:00, chickedy5490

Một vật dao động điều hòa có phương trình x=20cos(pi. t-pi/4) cm. vận tốc của lúc qua vị trí 10cm và đi theo chiều âm

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Một vật dao động điều hòa có phương trình x=20cos(pi. t-pi/4) cm. vận tốc của lúc qua vị trí 10cm v...

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