本课配套习题挑战模式1/5
A: 60牛 |
B: 120牛 |
C: 20牛 |
D: 180牛 |
- 提示1:IOWFiOWvueWKqOa7kei9ruWBmuWPl+WKm+WIhuaekO+8jOWQkeW3puaLieWKmzNG44CC
- 提示2:IOaJgOS7pee7s+WtkOWvueeJqeS9k+eahOaLieWKm+W6lOivpeaYrzNG44CC
- 提示3:IOeJqeS9k+WPl+WIsOWQkeW3pjNG55qE5ouJ5Yqb77yM5ZCR5Y+z55qE5pGp5pOm5Yqb77yM5ouJ5Yqb562J5LqO5pGp5pOm5Yqb44CC
- 答案:RA==
PGRpdj7niankvZPlj5fliLDlkJHlt6bnmoTmi4nlipszRuWSjOWQkeWPs+eahOaRqeaTpuWKm++8jOWboOS4uuebtOe6v+i/kOWKqO+8jOWQiOWKm+S4uumbtu+8jDNGPWY8L2Rpdj4=
本课配套习题挑战模式2/5
A: 拉力为80N |
B: 拉力为40N |
C: 绳的自由端拉出4m |
D: 绳的自由端拉出1m |
- 提示1:IOWvueS4pOS4quWKqOa7kei9ruWBmuWPl+WKm+WIhuaekO+8jOWQkeS4iuaLieWKmzRG44CC
- 提示2:IOWvueeJqeS9k+WBmuWPl+WKm+WIhuaekO+8jOWQkeS4iuaLieWKmzRG77yM5ZCR5LiL5piv54mp5L2T6YeN5Yqb44CC5ouJ5Yqb562J5LqO6YeN5Yqb44CC
- 提示3:IOaLieWKm+aYr+eJqeS9k+mHjeWKm+eahDEvNO+8jOecgeWKm+i0uei3neemu++8jOaLieWKm+iHqueUseerr+aLieWHuui3neemu+aYr+eJqeS9k+S4iuWNh+i3neemu+eahDTlgI3jgII=
- 答案:Qw==
PGRpdj7mnInlm5vogqHnu7PlrZDmi4nniankvZPvvIzmi4nlipvnrYnkuo4xLzTlgI3niankvZPph43lipvvvIznnIHlipvotLnot53nprvvvIznu7PlrZDoh6rnlLHnq6/mi4nlh7rot53nprvlupTor6XmmK/niankvZPkuIrljYfot53nprvnmoQ05YCN44CCPC9kaXY+
本课配套习题挑战模式3/5
图a、图b是由相同的滑轮组装的滑轮组,甲、乙两人分别用两装置在相等时间内将质量相等的重物匀速提升相同的高度,空气阻力、摩擦、滑轮和绳子的质量均不计,下列说法正确的是( )
A: 甲的拉力是乙的拉力的3倍 |
B: 乙拉绳子的速度大小是甲拉绳子速度的2倍 |
C: 甲拉力等于乙拉力 |
D: (a)装置比(b)装置省力 |
- 提示1:PHA+5a+577yIYe+8ieWbvuS4reeJqeS9k+WBmuWPl+WKm+WIhuaekO+8jOaLieWKm+etieS6jumHjeWKmzwvcD4=
- 提示2:PHA+5a+577yIYu+8ieWbvueJqeS9k+WBmuWPl+WKm+WIhuaekO+8jOS4pOiCoee7s+WtkOaLieeJqeS9k++8jDLlgI3mi4nlipvnrYnkuo7niankvZPph43lipvjgII8L3A+
- 提示3:PHA+55yB5Yqb6LS56Led56a777yM55yBMS8y55qE5Yqb77yM6LS5MuWAjei3neemu+OAgjwvcD4=
- 答案:Qg==
PGRpdj7vvIhh77yJ5piv5LiA6IKh57uz5a2Q5ouJ54mp5L2T77yM5ouJ5Yqb562J5LqO54mp5L2T6YeN5Yqb77yM77yIYu+8ieaYr+S4pOiCoee7s+WtkOaLieeJqeS9k++8jOaLieWKm+etieS6jjEvMueJqeS9k+mHjeWKm++8jOecgeWKm+i0uei3neemu++8jOecgTEvMueahOWKm++8jOi0uTLlgI3ot53nprvjgII8L2Rpdj4=
本课配套习题挑战模式4/5
如图所示,不计轮与轴的摩擦及滑轮的重力,物体处于平衡状态时( )
A: m1=m2 |
B: m1=2m2 |
C: m2=2m1 |
D: m1=4m2 |
- 提示1:PHA+5Lul5bem6L655ruR6L2u5YGa5Y+X5Yqb5YiG5p6Q77yM5Y+X5Yiw5Lik5Liq5ZCR5LiK55qE5ouJ5Yqb77yM5ZKM54mp5L2T55qE6YeN5YqbPC9wPg==
- 提示2:PHA+57uz5a2Q55qE5ouJ5Yqb562J5LqO54mp5L2TbTxzdWI+Mjwvc3ViPueahOmHjeWKmzwvcD4=
- 提示3:PHA+Mm08c3ViPjI8L3N1Yj49bTxzdWI+MTwvc3ViPjwvcD4=
- 答案:Qg==
PGRpdj7niankvZNtPHN1Yj4xPC9zdWI+5Y+X5Yiw5ZCR5LiK55qE5Lik5Liq5ouJ5Yqb5ZKM6Ieq6Lqr55qE6YeN5Yqb77yM5ouJ5Yqb562J5LqObTxzdWI+Mjwvc3ViPueahOmHjeWKm++8jOaJgOS7pTJtPHN1Yj4yPC9zdWI+PW08c3ViPjE8L3N1Yj48L2Rpdj4=
本课配套习题挑战模式5/5
体重为590N的某人用如图所示的滑轮组将自己匀速提升3m,动滑轮重为10N,若不考虑吊篮和绳重及摩擦,那么他所用的拉力和绳子自由端下降的距离分别是( )
A: 300N,6m |
B: 300N,1.5m |
C: 200N,1.5m |
D: 200N,6m |
- 提示1:PHA+5oqK5Lq677yM5ZCK56+u77yM5Yqo5ruR6L2u55yL5YGa5LiA5Liq5pW05L2T44CCPC9wPg==
- 提示2:PHA+5pW05L2T5Y+X5Yiw5ZCR5LiK55qE5ouJ5YqbM0bvvIzlkJHkuIvnmoTlipvmmK/kurrlvpfph43lips8L3A+
- 提示3:PHA+MuiCoee7s+WtkOaLieedgOa7kei9ru+8jOiHqueUseerr+S4i+mZjei3neemu+aYr+a7kei9rui/kOWKqOi3neemu+eahDLlgI08L3A+
- 答案:RA==
PGRpdj7miorkurrvvIzlkIrnr67vvIzliqjmu5Hova7nnIvlgZrkuIDkuKrmlbTkvZPvvIzmlbTkvZPlj5fliLDlkJHkuIrnmoTmi4nlipszRu+8jOWQkeS4i+eahOWKm+aYr+S6uuW+l+mHjeWKm++8jDLogqHnu7PlrZDmi4nnnYDmu5Hova7vvIzoh6rnlLHnq6/kuIvpmY3ot53nprvmmK/mu5Hova7ov5Dliqjot53nprvnmoQy5YCN44CC5Lq65Lmf5ouJ552A57uz5a2Q77yM5omA5Lul5YWx55SxM+autee7s+WtkOaJv+aLheeJqemHje+8jOiAjOiHqueUseerr+S4i+mZjei3neemu+aYr+eUsee7leWcqOWKqOa7kei9ruS4iueahOe7s+WtkOiCoeaVsOWGs+WumueahOOAgjxicj48L2Rpdj4=