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Gaokao Physics Practice Question

取水平地面为重力势能零点, 一物块从某一高度水平抛出, 在抛出 点其动能与重力势能恰好相等. 不计空气阻力, 该物块落地时的速度方向与 水平方向的夹角为

  1. A.$\frac{\pi}{6}$
  2. B.$\frac{\pi}{4}$
  3. C.$\frac{\pi}{3}$
  4. D.$\frac{5 \pi}{12}$

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