本课配套习题挑战模式1/5
单选题
难度系数:
1.某物体在第一、第二分钟内共前进了260m,第三分钟静止不动,第四分钟前进了100m,则它在4min内的平均速度为( )
A: 1.5m/s |
B: 1.67m/s |
C: 1.2m/s |
D: 2m/s |
一次做对,真牛!
+5奖励规则>
- 提示1:5bmz5Z2H6YCf5bqmPeaAu+i3r+eoiy/mgLvml7bpl7Q=
- 答案:QQ==
5qC55o2u6aKY5oSP5Y+v55+l77yM5Zub5YiG6ZKf5YaF55qE5oC76Lev56iL77yacz0yNjBtKzEwMG09MzYwbe+8m+WImeeJqeS9kzRtaW7lhoXnmoTlubPlnYfpgJ/luqbvvJp2PXMvdD0zNjBtL++8iDTDlzYwc++8iT0xLjVtL3PvvIzmlYXpgIlB77yO
本课配套习题挑战模式2/5
单选题
难度系数:
2.做“测平均速度”实验时,必用的两种测量工具是( )
A: 斜面和小车 |
B: 斜面和刻度尺 |
C: 小车和表 |
D: 刻度尺和表 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rWL6YeP5bCP6L2m5Zyo5pac6Z2i5LiK55qE5bmz5Z2H6YCf5bqm77yM6ZyA6KaB5rWL6YeP5pac6Z2i6ZW/5bqm5ZKM6L+Q5Yqo5pe26Ze0
- 答案:RA==
5qC55o2u5YWs5byPdj1zL3Tlj6/nn6XvvIzlgZrigJzmtYvlubPlnYfpgJ/luqbigJ3lrp7pqozml7bvvIzpnIDopoHmtYvph4/lsI/ovabnmoTov5Dliqjot6/nqIvlkozmiYDnlKjml7bpl7TvvIzmiYDku6XpnIDopoHnmoTmtYvph4/lt6XlhbfmmK/liLvluqblsLrlkoznp5LooajvvI7mlYXpgIlELg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.甲、乙两汽车同时从A地出发去B地,已知在整个过程中,甲平均速度大于乙的平均速度,下列有关叙述,正确的是( )
A: 在任何时刻,甲车一定在乙车前面 |
B: 在任何时刻,若以甲车为参照物,乙车在后退 |
C: 在整个过程中,甲车用的时间一定比乙车短 |
D: 在前半路程,甲车用的时间一定比乙车短 |
一次做对,真牛!
+5奖励规则>
- 提示1:5bmz5Z2H6YCf5bqmPeaAu+i3r+eoiy/mgLvml7bpl7Q=
- 答案:Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数:
4.一物体从甲地到乙地,去时的速度是20km/h,从乙地返回甲地的速度是12km/h,则该物体在全程中的平均速度是( )
A: 16km/h |
B: 15km/h |
C: 18km/h |
D: 17km/h |
一次做对,真牛!
+5奖励规则>
- 提示1:5bmz5Z2H6YCf5bqmPeaAu+i3r+eoiy/mgLvml7bpl7Q=
- 答案:Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.某同学在上学的路上前一半路程的速度为10m/s,后一半路程的速度为15m/s,则全程的平均速度为( )
A: 22.5m/s |
B: 25m/s |
C: 12m/s |
D: 13m/s |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yip55So5YWs5byP6KGo56S65Ye65YmN5Y2K56iL5omA55So5pe26Ze05ZKM5ZCO5Y2K56iL5omA55So5pe26Ze0
- 答案:Qw==
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