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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