A,B两个均匀物体,都放在水平桌面上,底面积之比为S A :S B =4:1,它们对水平桌面的压强之比P A :P B

1个回答

  • A、B在水平面上

    F A=G A,F B=G B
    又∵ p A =

    F A

    s A =

    G A

    s A , p B =

    F B

    s B =

    G B

    s B

    ∴G A=P AS A,G B=P BS B

    G A

    G B =

    p A S A

    p B S B =

    p A

    p B ×

    S A

    S B =

    1

    2 ×

    4

    1 =

    2

    1

    故选B.