挑战习题
1
/5
单选题
难度:
1.如图所示,置于水平桌面上的均匀木块对桌面的压强为P,若沿图中的虚线竖直切去
,则剩余部分对桌面的压强为( )
A
p
B
p
C
p
D
p
提示1:
IOerluWIh+aYr+W4uOingeWIh+WJsuaWueazleS5i+S4gO+8jOerluebtOWIh+WOu+eJqeS9k+eahOS4gOmDqOWIhuS5i+WQju+8jOeJqeS9k+WvueWcsOmdoueahOWOi+W8uuS4jeWPmA==
正确答案:
QQ==
PGRpdj7nq5bnm7TliIfljrvniankvZPnmoTkuIDpg6jliIbkuYvlkI7vvIzniankvZPlr7nlnLDpnaLnmoTljovlvLrkuI3lj5jvvIzliJnpgInmi6lBPC9kaXY+
2
/5
单选题
难度:
2.一块砖竖放在水平地面上,对地面的压强为p 。若如图那样,沿着斜线部分割去上面一部分,则剩余部分对地面的压强( )
A
不变
B
变大
C
变小
D
不能确定
提示1:
IOWmguWbvuWIh+WJsuS5i+WQjuWPl+WKm+mdouenr+S4jeWPmO+8jOWPquacieWOi+WKm+WPmOWwj++8jOWImeWOi+W8uuWPmOWwjw==
正确答案:
Qw==
PGRpdj7lj5flipvpnaLnp6/kuI3lj5jvvIzlj6rmnInljovlipvlj5jlsI/vvIzliJnljovlvLrlj5jlsI/vvIzmiYDku6XpgInmi6lDPC9kaXY+
3
/5
单选题
难度:
3.有一质地均匀的长方体放在水平地面上,对地面的压强为p
1
,若把长方体沿图示的虚线方向竖直切成a、b 两部分,使b的体积是a的二倍,取走a后,剩余部分b对地面的压强为p
2
,则( )
A
p
2
=p
1
B
p
2
<p
1
C
p
2
>p
1
D
p
2
=
p
提示1:
IOerluWIh+aYr+W4uOingeWIh+WJsuaWueazleS5i+S4gO+8jOerluebtOWIh+WOu+eJqeS9k+eahOS4gOmDqOWIhuS5i+WQju+8jOeJqeS9k+WvueWcsOmdoueahOWOi+W8uuS4jeWPmA==
正确答案:
QQ==
PGRpdj7nq5bnm7TliIfljrvniankvZPnmoTkuIDpg6jliIbkuYvlkI7vvIzniankvZPlr7nlnLDpnaLnmoTljovlvLrkuI3lj5jvvIzmiYDku6VwPHN1Yj4yPC9zdWI+PXA8c3ViPjE8L3N1Yj7vvIzpgInmi6lBPC9kaXY+
4
/5
单选题
难度:
4.如图所示,四块相同的木块放置在水平地面上,如将图中阴影部分去掉并取走,则剩余部分对水平地面的压强最大的是( )
A
B
C
D
提示1:
IOmAiemhuUHnq5bliIfvvIzniankvZPljovlvLrkuI3lj5g=
提示2:
IOmAiemhuULmlpzliIfkuYvlkI7liankvZnniankvZPlupXnq6/ovoPlsI/vvIzkuIrpg6jliIbovoPlpKfvvIzmiYDku6XljovlvLrlj5jlpKfvvJvogIxD5bqV56uv5aSn77yM5LiK6Z2i6YOo5YiG6L6D5bCP77yM5omA5Lul5Y6L5by65Y+Y5bCP
提示3:
IOmAiemhuUTmqKrliIfkuYvlkI7pq5jluqblj5jlsI/vvIzmoLnmja7mn7HkvZPljovlvLrlhazlvI88aW1nIHdpZHRoPTQ4IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0ZELzVGL3JCQUNGRk1KNVBEaDlKdlpBQUFCb25HRnFBazE1OS5wbmciPu+8jOWPr+efpeWOi+W8uuWPmOWwjw==
正确答案:
Qg==
PGRpdj7pgInpoblC5pac5YiH5LmL5ZCO5Ymp5L2Z54mp5L2T5bqV56uv6L6D5bCP77yM5LiK6YOo5YiG6L6D5aSn77yM5omA5Lul5Y6L5by65Y+Y5aSn77yM6YCJ5oupQjwvZGl2Pg==
5
/5
单选题
难度:
5.如图所示,长方体橡皮块平放在水平桌面上. 若沿图示的对角线切成两块,取走上面的一块,则余下部分对桌面的压力、压强与切割前的橡皮块相比( )
A
压力减半,压强减半
B
压力减半,压强不变
C
压力不变,压强减半
D
压力不变,压强不变
提示1:
IOayv+edgOWvueinkue6v+WIh+WOu+eahOmDqOWIhuaYr+WOn+adpeeahOS4gOWNiu+8jOWOi+WKm+S5n+WPmOS4uuWOn+adpeeahOS4gOWNig==
提示2:
IOW6lemdouenr+S4jeWPmO+8jOWOi+WKm+WHj+WNiu+8jOWImeWOi+W8uuWHj+WNig==
正确答案:
QQ==
PGRpdj7msr/nnYDlr7nop5Lnur/liIfljrvnmoTpg6jliIbmmK/ljp/mnaXnmoTkuIDljYrvvIzljovlipvkuZ/lj5jkuLrljp/mnaXnmoTkuIDljYrvvJvlupXpnaLnp6/kuI3lj5jvvIzljovlipvlh4/ljYrvvIzliJnljovlvLrlh4/ljYrvvIzmiYDku6XpgInmi6lB44CCPC9kaXY+