中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.
一杂技演员，用一只手抛球. 他每隔
抛出一球，接到球便立即把球抛出，已知除抛、接球的时刻外，空中总有四个球，将球的运动看作是竖直方向的运动，试求球到达的最大高度是多少. （高度从抛球点算起，取
）
一杂技演员，用一只手抛球. 他每隔抛出一球，接到球便立即把球抛出，已知除抛、接球的时刻外，空中总有四个球，将球的运动看作是竖直方向的运动，试求球到达的最大高度是多少. （高度从抛球点算起，取） | A: 3.2m |
| B: 4.2m |
| C: 6.4m |
| D: 3.4m |
一次做对，真牛！
+5奖励规则>
- 提示1：IOavj+S4gOS4quWwj+eQg+Wdh+WBmuerluebtOS4iuaKm+i/kOWKqA==
- 提示2：IOi/kOWKqOeahOWvueensOaApw==
- 答案：QQ==
5q+P5LiA5Liq5bCP55CD5Z2H5YGa56uW55u05LiK5oqb6L+Q5Yqo77yM55Sx6L+Q5Yqo55qE5a+556ew5oCn77yM5qC55o2u6aKY5oSP5Y+v5b6X5Ye66Iez5bCR5pyJ5aaC5Zu+5omA56S655qE54q25oCB77yM5YiZPGltZyB3aWR0aD0xODQgaGVpZ2h0PTM4IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMkMvNkQvckJBQ0UxTmd5NWJUNTQ2NUFBQUVRRFV6elBZMTQzLnBuZyI+77yM5Y2z55CD6IO95Yiw6L6+55qE5pyA5aSn6auY5bqm5pivPGltZyB3aWR0aD0zNCBoZWlnaHQ9MTggc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GMC82My9yQkFDRkZOZ3k1YnhuelNwQUFBQnNDbzVYOG83NjQucG5nIj4uIA==
本课配套习题挑战模式2/5
单选题
难度系数：
2.
年悉尼奥运会将蹦床运动列为奥运会的正式比赛项目，运动员在一张绷紧的弹性网上蹦起、腾空并做空中动作. 为了测量运动员跃起的高度，某同学在弹性网上安装了压力传感器，利用传感器记录运动员运动过程中对弹性网的压力，并用计算机做出压力——时间图象，如图所示. 设运动员在空中运动时可视为质点，则运动员跃起的最大高度为（）（ ）
年悉尼奥运会将蹦床运动列为奥运会的正式比赛项目，运动员在一张绷紧的弹性网上蹦起、腾空并做空中动作. 为了测量运动员跃起的高度，某同学在弹性网上安装了压力传感器，利用传感器记录运动员运动过程中对弹性网的压力，并用计算机做出压力——时间图象，如图所示. 设运动员在空中运动时可视为质点，则运动员跃起的最大高度为（）（ ） | A: 1.8m |
| B: 3.6m |
| C: 5.0m |
| D: 7.2m |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi/kOWKqOWRmOWcqOepuuS4reeahOaXtumXtOS4uuS9nOeUqOWKm+S4uumbtueahOaXtumXtO+8jOWNszxpbWcgd2lkdGg9OTAgaGVpZ2h0PTE4IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkMvNkQvckJBQ0UxTmd5NXFodUE5Q0FBQUNMOWJ5eXBvMjA2LnBuZyI+
- 提示2：IOS4iuWNh+eahOaXtumXtOS4ujxpbWcgd2lkdGg9MTYgaGVpZ2h0PTE4IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvNjMvckJBQ0ZGTmd5NXVRZjI5Z0FBQUJHbGgtZHVJMDYzLnBuZyI+
- 答案：Qw==
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
本课配套习题挑战模式3/5
多选题
难度系数：
3.从地面竖直上抛一物体
，同时在离地面某一高度处有另一物体
自由落下，两物体在空中同时到达同一高度时速率都为，则下列说法中正确的是（ ）
，同时在离地面某一高度处有另一物体自由落下，两物体在空中同时到达同一高度时速率都为，则下列说法中正确的是（ ） | A: 物体向上抛出的初速度和物体落地时速度的大小相等 |
B: 物体 在空中运动的时间相等 |
| C: 物体能上升的最大高度和开始下落的高度相同 |
D: 相遇时，上升的距离和下落的距离之比为 |
一次做对，真牛！
+5奖励规则>
- 提示1：PGltZyB3aWR0aD0zNyBoZWlnaHQ9MTggc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yQy82RC9yQkFDRTFOZ3k2R0N6NUczQUFBQm9CZjlMQjQ4NjAucG5nIj7nm7jpgYfml7bpgJ/njofnm7jnrYk=
- 提示2：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
- 答案：QSxDLEQ=
PGltZyB3aWR0aD0zNyBoZWlnaHQ9MTggc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yQy82RC9yQkFDRTFOZ3k2R0N6NUczQUFBQm9CZjlMQjQ4NjAucG5nIj7nm7jpgYfml7bpgJ/njofnm7jnrYnvvIzmlYXmnLrmorDog73nm7jnrYnvvIzmlYVB44CBQ+ato+ehri4g6K6+PGltZyB3aWR0aD0xNiBoZWlnaHQ9MTcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yQy82RC9yQkFDRTFOZ3k2R0FIRmVLQUFBQk01VnFJcEUwNTAucG5nIj7ku47lvIDlp4vkuIvokL3liLDkuI48aW1nIHdpZHRoPTE2IGhlaWdodD0xNyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJDLzZEL3JCQUNFMU5neTZHQUhGZUtBQUFCTTVWcUlwRTA1MC5wbmciPuebuOmBh+aJgOeUqOaXtumXtOS4ujxpbWcgd2lkdGg9MTAgaGVpZ2h0PTE2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvNjMvckJBQ0ZGTmd5NkhRS0pzYkFBQUJBUjl1NTlVMTIxLnBuZyI+77yM5pyJPGltZyB3aWR0aD02OSBoZWlnaHQ9MjIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yQy82RC9yQkFDRTFOZ3k2SFNFcllSQUFBQi1IWk9seWsxOTAucG5nIj7vvIzlvpc8aW1nIHdpZHRoPTU4IGhlaWdodD0yMiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0YwLzYzL3JCQUNGRk5neTZHRDBpdmRBQUFDRF9XaXJkMDAzMS5wbmciPu+8jOWNszxpbWcgd2lkdGg9MTYgaGVpZ2h0PTE3IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMkMvNkQvckJBQ0UxTmd5NkdBSEZlS0FBQUJNNVZxSXBFMDUwLnBuZyI+5LuO5byA5aeL5LiL6ZmN5Yiw6JC95Zyw55So55qE5pe26Ze05Li6PGltZyB3aWR0aD0xOCBoZWlnaHQ9MTggc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yQy82RC9yQkFDRTFOZ3k2SEJoUDNyQUFBQlRWcjhrX28xMzYucG5nIj7vvIw8aW1nIHdpZHRoPTE2IGhlaWdodD0xNyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJDLzZEL3JCQUNFMU5neTZHQUhGZUtBQUFCTTVWcUlwRTA1MC5wbmciPuW3suS4i+mZjeeahOi3neemu+S4ujxpbWcgd2lkdGg9MjggaGVpZ2h0PTM4IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvNjMvckJBQ0ZGTmd5Nkd5eWtBckFBQUI3NG1sS2w0OTk2LnBuZyI+LiA8aW1nIHdpZHRoPTE2IGhlaWdodD0xNyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJDLzZEL3JCQUNFMU5neTZHQUhGZUtBQUFCTTVWcUlwRTA1MC5wbmciPuiQveWcsOWJjei/mOimgeS4i+mZjeeahOi3neemu+S4ujxpbWcgd2lkdGg9MTI1IGhlaWdodD00MCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJDLzZEL3JCQUNFMU5neTZHZ3FQRG5BQUFEZ2F0d1B3STk1OC5wbmciPu+8jOi/meS5n+aYrzxpbWcgd2lkdGg9MzcgaGVpZ2h0PTE4IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkMvNkQvckJBQ0UxTmd5NkdDejVHM0FBQUJvQmY5TEI0ODYwLnBuZyI+55u46YGH5pe2PGltZyB3aWR0aD0xNiBoZWlnaHQ9MTcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GMC82My9yQkFDRkZOZ3k2R3o5QU51QUFBQkpubFp2eVU2NzYucG5nIj7kuIrljYfnmoTot53nprvvvIzmlYVE5q2j56GuLiA=
本课配套习题挑战模式4/5
单选题
难度系数：
4.风景旖旎的公园都有喷泉以增加观赏性. 若一喷泉喷出的水柱高达
，已知水的密度为
，喷泉出口的面积为
，空中水的质量为（ ）
，已知水的密度为，喷泉出口的面积为，空中水的质量为（ ） A: |
B: |
C: |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IOiuvuaDs+awtOWBmuerluebtOS4iuaKm+i/kOWKqA==
- 提示2：IOWcqOepuuS4rei/kOWKqOaXtumXtDxpbWcgd2lkdGg9NjEgaGVpZ2h0PTIyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkMvNkQvckJBQ0UxTmd5NmJqS1NsZkFBQUNOREkta1JJNjMzLnBuZyI+
- 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.杂技演员把
个球依次竖直向上抛出，形成连续的循环. 在循环中，他每抛出一球后，再过一段与刚抛出的球与刚才在手中停留时间相等的时间，又接到下一个球，这样，在总的循环过程中，便形成有时空中有个球，有时空中有
个球，而演员手中则有一半时间内有
个球，有一半时间内没有球. 设每个球上升的高度为
，取，则每个球每次在手中停留的时间是_______.
个球依次竖直向上抛出，形成连续的循环. 在循环中，他每抛出一球后，再过一段与刚抛出的球与刚才在手中停留时间相等的时间，又接到下一个球，这样，在总的循环过程中，便形成有时空中有个球，有时空中有个球，而演员手中则有一半时间内有个球，有一半时间内没有球. 设每个球上升的高度为，取，则每个球每次在手中停留的时间是_______. | A: 0.2s |
| B: 0.4s |
| C: 0.6s |
| D: 0.8s |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUsemimOaEj+efpeavj+S4queQg+WcqOepuuS4rei/kOihjOeahOaXtumXtOS4ujxpbWcgd2lkdGg9MTYgaGVpZ2h0PTE4IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvNjMvckJBQ0ZGTmd5NXVRZjI5Z0FBQUJHbGgtZHVJMDYzLnBuZyI+
- 提示2：IOeUsemimOaEj+efpeavj+S4queQg+WcqOepuuS4rei/kOihjOeahOaXtumXtOS4ujxpbWcgd2lkdGg9MTYgaGVpZ2h0PTE4IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvNjMvckJBQ0ZGTmd5NXVRZjI5Z0FBQUJHbGgtZHVJMDYzLnBuZyI+
- 答案：QQ==
6K6+5q+P5Liq55CD5Zyo5omL5Lit5YGc55WZ55qE5pe26Ze05Li6PGltZyB3aWR0aD0xMCBoZWlnaHQ9MTYgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GMC82My9yQkFDRkZOZ3k2SFFLSnNiQUFBQkFSOXU1OVUxMjEucG5nIj7vvIznlLHpopjmhI/nn6Xmr4/kuKrnkIPlnKjnqbrkuK3ov5DooYznmoTml7bpl7TkuLo8aW1nIHdpZHRoPTE2IGhlaWdodD0xOCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0YwLzYzL3JCQUNGRk5neTV1UWYyOWdBQUFCR2xoLWR1STA2My5wbmciPu+8jOS4gOS4queQg+aKm+WHuuWQju+8jOWGjee7j+i/hzxpbWcgd2lkdGg9MTcgaGVpZ2h0PTE4IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvNjMvckJBQ0ZGTmd5NnZ6ejF6X0FBQUJRTVRkQW9vOTc2LnBuZyI+55qE5pe26Ze05YaN5qyh5Zue5Yiw5omL5Lit77yM5omA5Lul55CD5q+P5qyh5Zyo5omL5Lit5YGc55WZ55qE5pe26Ze05Li6PGltZyB3aWR0aD0yOSBoZWlnaHQ9MTggc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yQy82RC9yQkFDRTFOZ3k2dndmOVdzQUFBQmtQcUZHQTg4MzcucG5nIj4uIA==
