本课配套习题挑战模式1/5
单选题
难度系数:
1.
下列四位科学家中,用其名字命名为功的单位的是()
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5Yqf5ZKM6IO955qE5Y2V5L2N5piv5Lul54Sm6ICz55qE5ZCN5a2X5ZG95ZCN55qEPC9wPg==
- 答案:Qg==
PHA+QeOAgeeTpueJueaYr+eUteWKn+eOh+eahOWNleS9je+8jOS4jeWQiOmimOaEj++8mzxicj5C44CB5Yqf5ZKM6IO955qE5Y2V5L2N5piv5Lul54Sm6ICz55qE5ZCN5a2X5ZG95ZCN55qE77yM5ZCI6aKY5oSP77ybPGJyPkPjgIHlipvnmoTljZXkvY3mmK/ku6XniZvpob/nmoTlkI3lrZflkb3lkI3nmoTvvIzkuI3lkIjpopjmhI/vvJs8YnI+ROOAgeeUtemYu+eahOWNleS9jeaYr+S7peasp+WnhueahOWQjeWtl+WRveWQjeeahO+8jOS4jeespuWQiOmimOaEj++8mzxicj7mlYXpgIlD77yOPC9wPg==
本课配套习题挑战模式2/5
单选题
难度系数:
2.如图,下列过程中,人对物体做功的是()
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:5Lq65a+557Gz6KKL5pyJ5Yqb55qE5L2c55So77yM5ZCM5pe257Gz6KKL5Zyo5Yqb55qE5pa55ZCR5LiK5Lqn55Sf5LqG6Led56a777yM5pWF5Lq65a+557Gz6KKL5YGa5Yqf
- 答案:QQ==
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
本课配套习题挑战模式3/5
单选题
难度系数:
3.在国际单位制中,功的单位是()
A: N (牛) |
B: J (焦) |
C: W (瓦) |
D: Pa (帕) |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yqf5ZKM6IO955qE5Y2V5L2N5piv5Lul54Sm6ICz55qE5ZCN5a2X5ZG95ZCN55qE
- 答案:Qg==
5a+55q+P5Liq6YCJ6aG56L+b6KGM5YiG5p6Q77yM5piO56Gu5ZCE6Ieq5a+55bqU55qE54mp55CG6YeP5bCx6IO956Gu5a6a56ym5ZCI6aKY5oSP55qE6YCJ6aG544CCQeOAgU7vvIjniZvvvInmmK/lipvnmoTljZXkvY3vvI7kuI3nrKblkIjpopjmhI/vvJtC44CBSu+8iOeEpu+8ieaYr+WKn+eahOWNleS9je+8juespuWQiOmimOaEj++8m0PjgIFX77yI55Om77yJ5piv5Yqf546H55qE5Y2V5L2N77yO5LiN56ym5ZCI6aKY5oSP77ybROOAgVBh77yI5biV77yJ5piv5Y6L5by655qE5Y2V5L2N77yO5LiN56ym5ZCI6aKY5oSPLuaVhemAiULjgII=
本课配套习题挑战模式4/5
单选题
难度系数:
4.1焦=1牛×米,就是()
A: 把质量为1千克的物体移动1米所做的功 |
B: 把重为1牛的物体移动1米所做的功 |
C: 在1牛的力作用下,物体在力的方向上移动1米所做的功 |
D: 作用在杠杆上的动力为1牛,动力臂是1米 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yqf55qE5Y2V5L2N5Y+v5Lul6KGo56S65Li6TjxpbWcgd2lkdGg9MTggaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQUEvckJBQ0psVEltZ1N5LVptTkFBQUFfSXV0MFdJMzQyLnBuZyI+
- 答案:Qw==
MUo9MU48aW1nIHdpZHRoPTE4IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0FBL3JCQUNKbFRJbWdTeS1abU5BQUFBX0l1dDBXSTM0Mi5wbmciPu+8jOS5n+WwseaYr+WcqO+8keeJm+eahOWKm+S9nOeUqOS4i++8jOeJqeS9k+WcqOWKm+eahOaWueWQkeS4iuenu+WKqO+8keexs+aJgOWBmueahOWKn++8jOaJgOS7pemAiUM=
本课配套习题挑战模式5/5
单选题
难度系数:
5.李阳同学用100N的力踢一个重为6N的足球,球离开脚后在水平草地上向前滚动了20m.在球滚动的过程中,李阳同学对足球做的功是( )
A: 2000J |
B: 600J |
C: 120J |
D: 0J |
一次做对,真牛!
+5奖励规则>
- 提示1:Vz1Gcw==
- 提示2:55CD56a75byA6ISa5ZCO5Zyo5rC05bmz6I2J5Zyw5LiK5ZCR5YmN5rua5Yqo5LqGMjBt77yM5q2k5pe25rKh5pyJ5Yqb55qE5L2c55SoIA==
- 答案:RA==
55CD56a76ISa5ZCO77yM5Zyo5rC05bmz6I2J5Zyw5LiK5ZCR5YmN5rua5Yqo55qE6L+H56iL5Lit77yM6Z2g5oOv5oCn6L+Q5Yqo77yM55CD6ISx56a75LqG6ISa77yM6ISa5rKh5pyJ57uZ55CD5pa95Yqg5Yqb77yM5a+555CD5LiN5YGa5Yqf77yM5pWFROato+ehru+8jEHjgIFC44CBQ+mDvemUme+8jjxicj7mlYXpgIlE77yO