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Một vật dao động điều hòa trên một đường nằm ngang .Khi t=0 vật có vận tốc 40căn(3)cm hướng theo chiều dương quỹ đạo và đến lúc vận tốc bằng 0 lần thứ nhất nó đi được quãng đường 7,5cm. Biết rằng quãng đường vật đi được tronh hai chu kì dao động liên tiếp là 40cm. Viêt pt dao động điều hòa
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Một vật dao động điều hòa trên một đường nằm ngang .Khi t=0 vật có vận tốc 40căn(3)cm hướng theo chi...
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