本课配套习题挑战模式1/5
单选题
难度系数:
1.跳远运动是一项常见的体育运动。跳远运动员在比赛中都是先助跑一段距离后才起跳,这样做的目的是()
A: 增大运动员的惯性 |
B: 减小运动员的惯性 |
C: 增大运动员的动能 |
D: 减小运动员的动能 |
一次做对,真牛!
+5奖励规则>
- 提示1:5oOv5oCn5piv54mp5L2T5pys6Lqr55qE5oCn6LSo77yM5oOv5oCn55qE5aSn5bCP5Y+q5LiO6LSo6YeP5pyJ5YWz
- 答案:Qw==
5oOv5oCn5piv54mp5L2T5pys6Lqr55qE5oCn6LSo77yM5oOv5oCn55qE5aSn5bCP5Y+q5LiO6LSo6YeP5pyJ5YWz77yO6Lez6L+c6L+Q5Yqo5ZGY5Zyo5q+U6LWb5Lit6YO95piv5YWI5Yqp6LeR5LiA5q616Led56a75ZCO5omN6LW36Lez77yM5pS55Y+Y55qE5Y+q5piv6YCf5bqm77yM6ICM5rKh5pS55Y+Y6L+Q5Yqo5ZGY55qE6LSo6YeP77yM5omA5Lul6L+Q5Yqo5ZGY55qE5oOv5oCn5rKh5Y+Y77yO5Y+q5piv5aKe5Yqg5LqG6L+Q5Yqo5ZGY55qE5Yqo6IO977yO5pWFQeOAgULjgIFE6ZSZ6K+v
本课配套习题挑战模式2/5
单选题
难度系数:
2.如图是小车做变速直线运动时,车内悬挂的小球和杯中水面在某一瞬间的情况,其中符合物理规律的是:()
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI5YiG5p6Q5bCP6L2m55qE6L+Q5Yqo54q25oCB
- 答案:RA==
55Sx5LqO5oOv5oCn6L2m5YaF5oKs5oyC55qE5bCP55CD5ZKM5p2v5Lit5rC06Z2i5Zyo6L2m5ZCR5bem56qB54S25YGc5q2i5oiW56qB54S25Yqg6YCf5pe277yM5Lya5Ye6546w5aaC5Zu+ROS4reeahOeOsOixoQ==
本课配套习题挑战模式3/5
单选题
难度系数:
3.物体表现出惯性的现象是常见的.下列事例中,属于利用惯性的是
A: 甲图中汽车突然起动时,人会后仰 |
B: 乙图中飞船返回舱落地前打开降落伞 |
C: 丙图中离弦的箭继续飞行 |
D: 丁图中汽车撞车时,安全气囊打开 |
一次做对,真牛!
+5奖励规则>
- 提示1:56qB54S25ZCv5Yqo5YmN77yM5Lq65ZKM6L2m6YO95aSE5LqO6Z2Z5q2i54q25oCB77yM5b2T6L2m56qB54S25ZCv5Yqo5pe277yM5Lq655Sx5LqO5oOv5oCn6L+Y6KaB5L+d5oyB5Y6f5p2l55qE6Z2Z5q2i54q25oCB77yM5omA5Lul5Lya5ZCR5ZCO5Luw77yM5L2G5bm25LiN5piv5Yip55So5oOv5oCn
- 提示2:6aOe6Ii56L+U5Zue6Iix6JC95Zyw5pe25omT5byA6ZmN6JC95Lye5piv5Yip55So6Zi75Yqb5L2/6JC95Zyw5pe255qE6YCf5bqm6L6D5bCP
- 提示3:5rG96L2m6KKr5pKe5pe277yM5Lq655Sx5LqO5oOv5oCn5Lya57un57ut5ZCR5YmN6L+Q5Yqo77yM5a6J5YWo5rCU5ZuK5piv6Ziy5q2i5ZCR5YmN6L+Q5Yqo55qE6L+H56iL5Lit5aS06YOo6KKr5pKe5Lyk77yM5Zug5q2k5piv6Ziy5q2i5oOv5oCn5bim5p2l55qE5Y2x5a6z
- 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.关于惯性,下列说法正确的是()
A: 物体在阻力相同的情况下,速度大的不容易停下来,所以速度大的物体惯性大 |
B: 推动地面上静止的物体比维持这个物体做匀速运动所需的力大,所以静止的物体惯性大 |
C: 在月球上举重比在地球上容易,所以同一个物体在月球上比在地球上惯性小 |
D: 物体的惯性与物体运动速度的大小、物体运动状态的改变、物体所处的位置无关 |
一次做对,真牛!
+5奖励规则>
- 提示1:5oOv5oCn5piv5oyH54mp5L2T5L+d5oyB6Z2Z5q2i5oiW5YyA6YCf55u057q/6L+Q5Yqo54q25oCB55qE5oCn6LSo77yM5oOv5oCn5piv54mp5L2T55qE5LiA56eN5bGe5oCn77yM5a6D55qE5aSn5bCP5LiO54mp5L2T55qE6LSo6YeP5pyJ5YWz77yM5LiO54mp5L2T55qE5b2i54q244CB54q25oCB44CB5L2N572u562J5Zug57Sg5peg5YWz
- 答案:RA==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.
让一个表面光滑的小钢块,在没有任何阻力的水平面上向前滑动,那么它的速度:()
A: 会逐渐变大 |
B: 会逐渐变小 |
C: 会永远保持下去 |
D: 以上说法都不对 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5Yqb5piv5pS55Y+Y54mp5L2T6L+Q5Yqo54q25oCB55qE5Y6f5ZugPC9wPg==
- 答案:Qw==
PHA+5b2T5bCP6ZKi5Z2X77yM5Zyo5rKh5pyJ5Lu75L2V6Zi75Yqb55qE5rC05bmz6Z2i5LiK5ZCR5YmN5ruR5Yqo77yM5Lya55Sx5LqO5oOv5oCn5L+d5oyB5pyA5byA5aeL55qE6L+Q5Yqo54q25oCB5LiA55u06L+Q5Yqo5LiL5Y6744CC5omA5Lul6YCJQzwvcD4=