如图9所示,宇航员站在某质量分布均匀的星球表面一斜坡上P点沿水

如图9所示,宇航员站在某质量分布均匀的星球表面一斜坡上P点沿水平方向以初速度v0抛出一个小球,测得小球经时间t落到斜坡上另一点Q,斜面倾角为α,已知星球半径为R,万有引力常量为G,求:

(1)该星球表面的重力加速度g

(2)该星球的密度ρ

(3)该星球的第一宇宙速度v

答案

(1)   (2)   (3)


解析:

(1)

   ………………………………………………………4分

(2)

          …………………………………………3分

(3)

  ………………………………….3分

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