本课配套习题挑战模式1/5
如图所示,用一根绳子绕过定滑轮,一端拴在钩码上,手执另一端,分别用力F1、F2、F3匀速拉起钩码. 忽略绳子与滑轮的摩擦,下列说法中正确的是( )
A: F1较小 |
B: F2较大 |
C: F1、F2、F3的大小不能确定 |
D: F1、F2、F3的大小相等 |
- 提示1:PHA+5Zu+5Lit5ruR6L2u5piv5a6a5ruR6L2u44CCPC9wPg==
- 提示2:PHA+5a6a5ruR6L2u5pS55Y+Y5Yqb55qE5pa55ZCR77yM5LiN5pS55Y+Y5Yqb55qE5aSn5bCP44CCPC9wPg==
- 提示3:PHA+5Y+v5Lul5oqK5a6a5ruR6L2u55yL5YGa562J6IeC5p2g5p2G77yM562J6IeC5p2g5p2G5pei5LiN55yB5Yqb77yM5Lmf5LiN55yB6Led56a744CCPC9wPg==
- 答案:RA==
PGRpdj7lrprmu5Hova7nm7jlvZPkuo7nrYnoh4LmnaDmnYbvvIzmlLnlj5jlipvnmoTmlrnlkJHvvIzkvYbkuI3mlLnlj5jlipvnmoTlpKflsI/jgII8L2Rpdj4=
本课配套习题挑战模式2/5
A: 甲是动滑轮,使用时不能省力 |
B: 乙是动滑轮,使用时可以省力 |
C: 甲是定滑轮,使用时可以省力 |
D: 乙是定滑轮,使用时不能省力 |
- 提示1:IOWumua7kei9ruS4jeecgeWKm++8jOWKqOa7kei9ruecgeWKm+OAgg==
- 提示2:IOWumua7kei9ruWbuuWumuS4jeWKqO+8jOWKqOa7kei9rumaj+edgOeJqeS9k+i/kOWKqOOAgg==
- 提示3:IOeUsuaYr+Wumua7kei9ru+8jOS5meaYr+WKqOa7kei9ruOAgg==
- 答案:Qg==
PGRpdj7nlLLmmK/lrprmu5Hova7vvIzkuI3nnIHlipvvvIzkvYbmmK/mlLnlj5jlipvnmoTmlrnlkJHvvIzkuZnmmK/liqjmu5Hova7vvIznnIHlipvvvIzkvYbkuI3mlLnlj5jlipvnmoTmlrnlkJHjgII8L2Rpdj4=
本课配套习题挑战模式3/5
如图所示,弹簧测力计的读数是8N,不计绳重,滑轮重及摩擦,则( )
A: 拉力F是8N,物重G是8N |
B: 拉力F是16N,物重G是16N |
C: 拉力F是8N,物重G是16N |
D: 拉力F是16N,物重G是8N |
- 提示1:PHA+5ruR6L2u5piv5Yqo5ruR6L2u77yM5Yqo5ruR6L2u55yB5Yqb44CCPC9wPg==
- 提示2:PHA+5LiN6ICD6JmR57uz5a2Q6YeN5ZKM5pGp5pOm77yM5LiA5qC557uz5a2Q5LiK5Y+X5Yqb55u4562J44CCPC9wPg==
- 提示3:PHA+5ouJ5Yqb5piv54mp5L2T6YeN5Yqb55qE5LiA5Y2K77yM5ZCM5pe2562J5LqO5by557Cn56ek55qE56S65pWw44CCPC9wPg==
- 答案:Qw==
PGRpdj7liqjmu5Hova7nnIHlipvotLnot53nprvvvIzlubbkuJTnnIHkuIDljYrlipvvvIzkuIDmoLnnu7PlrZDkuIrlj5flipvnm7jlkIzvvIzmi4nliptG562J5LqOOE7jgILph43nialH562J5LqOMuWAjeaLieWKm++8jOetieS6jjE2TuOAgjxicj48L2Rpdj4=
本课配套习题挑战模式4/5
如图所示,在竖直向上大小为10N的力F的作用下,重物A沿竖直方向匀速上升. 已知重物A上升速度为0.2m/s,不计滑轮重、绳重及绳与滑轮间的摩擦,则物体的重力大小和滑轮上升的速度分别为( )
A: 20N 0.4m/s |
B: 20N 0.1m/s |
C: 5N 0.4m/s |
D: 5N 0.1 m/s |
- 提示1:PHA+5ruR6L2u5piv5Yqo5ruR6L2u77yM55yB5Yqb6LS56Led56a744CCPC9wPg==
- 提示2:PHA+5ruR6L2u5piv5Yqo5ruR6L2u77yM5omA5Lul54mp5L2T6YeN5Yqb5piv5ouJ5YqbRueahDEvMuWAjeOAgjxicj48L3A+
- 提示3:PHA+5ruR6L2u5piv5Yqo5ruR6L2u77yM5ruR6L2u5LiK5Y2H6YCf5bqm5bqU6K+l5piv54mp5L2T6YCf5bqm55qE5LiA5Y2K77yM5Y2zdj0wLjFtL3PjgII8L3A+
- 答案:RA==
PGRpdj7liqjmu5Hova7nnIHlipvotLnot53nprvvvIzmiYDku6XniankvZPph43lipvmmK/mi4nliptG55qEMS8y5YCN77yM54mp5L2T6L+Q5Yqo55qE6YCf5bqm5piv5YqbRumAn+W6pueahDLlgI3jgII8YnI+PC9kaXY+
本课配套习题挑战模式5/5
A: |
B: |
C: , |
D: |
- 提示1:IOesrOS4gOW5heWbvuaYr+WKqOa7kei9ru+8jOebuOW9k+S6juecgeWKm+adoOadhu+8jOecgeWKm+i0uei3neemu+OAgg==
- 提示2:IOesrOS6jOW5heWbvuS5n+aYr+WKqOa7kei9ru+8jOS9huaYr+aLieWKm+S9nOeUqOeCueWcqOa7kei9ruS4reW/g+i9tOS4iu+8jOebuOW9k+S6jui0ueWKm+adoOadhu+8jOi0ueWKm+ecgei3neemu+OAgg==
- 提示3:IEY8c3ViPjE8L3N1Yj7nrYnkuo4xLzLniankvZPlj5fliLDnmoTmkanmk6blipvvvIxGPHN1Yj4yPC9zdWI+562J5LqOMuWAjeeJqeS9k+WPl+WIsOeahOaRqeaTpuWKm+OAgkY8c3ViPjI8L3N1Yj7mmK9GPHN1Yj4xPC9zdWI+55qE5Zub5YCN77yM5Yqb55yB6LS56Led56a777yM5omA5LulUzxzdWI+MTwvc3ViPuaYr1M8c3ViPjI8L3N1Yj7nmoQ05YCN44CC
- 答案:RA==
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