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Gaokao Physics Practice Question

1. (6 分) 2017 年 4 月, 我国成功发射的天舟一号货运飞船与天宫二号空间实 验室完成了首次交会对接, 对接形成的组合体仍沿天宫二号原来的轨道 (可 视为圆轨道) 运行. 与天宫二号单独运行相比, 组合体运行的 $(\quad)$

  1. A.周期变大
  2. B.速率变大
  3. C.动能变大
  4. D.向心加速度变大

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