007mkhoi 007mkhoi
  • 13-12-2022
  • Physics
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Một chất điểm chuyển động theo phương trình: ⃗() = 2. ⃗ − (32 − 1).⃗ + 5⃗⃗. Trong đó: r
tính bằng m, t tính bằng s. Tại thời điểm t=2s kể từ khi bắt đầu chuyển động, chất điểm ở vị
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