①V甲=0.1m×0.1m×0.1m=0.001m3,
ρ甲=
m甲 |
V乙 |
6kg |
0.001m3 |
②∵在水平地面上,
∴乙对地面的压力:
F乙=G乙=m乙g=ρ乙V乙g=4×103kg/m3×(0.2m)3×9.8N/kg=313.6N;
乙对地面的压强:
p乙=
F乙 |
S乙 |
313.6N |
0.2m×0.2m |
③设截去部分的宽度L,放在自己上方后对地面的压力不变F=G,
甲的受力面积变为S甲′=(0.1m-L)×0.1m,
乙的受力面积变为S乙′=(0.2m-L)×0.2m,
pA′=
F甲 |
S甲′ |
G甲 |
(0.1m?L)×0.1m |
58.8N |
(0.1m?L)×0.1m |
pB′=
F乙 |
S乙′ |
G乙 |
(0.2m?L)×0.2m |
313.6 |
(0.2m?L)×0.2m |
∵pA′=pB′,
即:
58.8N |
(0.1m?L)×0.1m |
313.6 |
(0.2m?L)×0.2m |
解得:L=0.04m.
答:(1)正方体甲的密度为6×103kg/m3;
(2)正方体乙对水平地面的压强为7840Pa;
(3)截去部分的宽度为0.04m.
本文地址: http://www.goggeous.com/20250103/1/1145331
文章来源:天狐定制
版权声明:除非特别标注,否则均为本站原创文章,转载时请以链接形式注明文章出处。
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-03 02:35:22职业培训
2025-01-03 02:35:13职业培训
2025-01-03 02:35:12职业培训
2025-01-03 02:35:12职业培训
2025-01-03 02:35:11职业培训
2025-01-03 02:35:11职业培训
2025-01-03 02:35:10职业培训
2025-01-03 02:35:10职业培训
2025-01-03 02:35:09职业培训
2025-01-03 02:35:08职业培训
2024-12-11 12:43职业培训
2025-01-04 16:53职业培训
2024-12-03 16:07职业培训
2024-12-10 04:11职业培训
2024-12-04 05:47职业培训
2024-11-25 19:59职业培训
2024-12-11 02:48职业培训
2025-01-05 18:31职业培训
2024-12-11 23:43职业培训
2024-12-07 06:48职业培训
扫码二维码
获取最新动态