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.
在平直公路上，自行车与同方向行驶的一辆汽车在t=0时同时经过某一个路标，它们的位移随时间变化的规律为：汽车x=10t-t2，自行车x=5t，(x的单位为m，t的单位为s)，则下列说法正确的是
| A: 汽车做匀加速直线运动，自行车做匀速直线运动 |
| B: 经过路标后的较短时间内自行车在前，汽车在后 |
| C: 在t=2.5 s时，自行车和汽车相距最远 |
| D: 当两者再次同时经过同一位置时，它们距路标12.5 m |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx5rG96L2m5ZKM6Ieq6KGM6L2m5L2N56e76ZqP5pe26Ze05Y+Y5YyW55qE6KeE5b6L55+l77yM5rG96L2m5YGa5YyA5YeP6YCf6L+Q5YqoPC9wPg==
- 提示2：PHA+6Ieq6KGM6L2m5YGa5YyA6YCf55u057q/6L+Q5YqoPC9wPg==
- 答案：Qw==
PHA+55Sx5rG96L2m5ZKM6Ieq6KGM6L2m5L2N56e76ZqP5pe26Ze05Y+Y5YyW55qE6KeE5b6L55+l77yM5rG96L2m5YGa5YyA5YeP6YCf6L+Q5Yqo77yMdjA9MTAgbS9z77yMYT0tMiBtL3My77yM6Ieq6KGM6L2m5YGa5YyA6YCf55u057q/6L+Q5Yqo77yMdj01IG0vc++8jOaVhUHjgIFC6ZSZ6K+vLuW9k+axvei9pumAn+W6puWSjOiHquihjOi9pumAn+W6puebuOetieaXtu+8jOebuOi3neacgOi/nC7moLnmja52PXYwK2F077yMdD0yLjUgc++8jEPmraPnoa4u5b2T5Lik6L2m5L2N56e755u4562J5pe25YaN5qyh57uP6L+H5ZCM5LiA5L2N572uLOaVhTEwdOKAsi104oCyMj01dOKAsizop6Plvpd04oCyPTUgcyx4PTI1IG3vvIzmlYVE6ZSZ6K+vPC9wPg==
本课配套习题挑战模式2/5
单选题
难度系数：
2.甲、乙两辆汽车，同时在一条平直的公路上自西向东运动，开始时刻两车平齐，相对于地面的v－t图象如图所示，关于它们的运动，下列说法正确的是
| A: 甲车中的乘客说，乙车先以速度v0向西做匀减速运动，后向东做匀加速运动 |
| B: 乙车中的乘客说，甲车先以速度v0向西做匀减速运动，后做匀加速运动 |
| C: 根据v－t图象可知，开始乙车在前，甲车在后，两车距离先减小后增大，当乙车速度增大到v0时，两车恰好平齐 |
| D: 根据v－t图象可知，开始甲车在前，乙车在后，两车距离先增大后减小，当乙车速度增大到v0时，两车恰好平齐 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUsui9puS4reeahOS5mOWuouS7peeUsui9puS4uuWPguiAg+ezu++8jOebuOW9k+S6jueUsui9pumdmeatouS4jeWKqO+8jOS5mei9puS7peWInemAn+W6pjxpPnY8L2k+PHN1Yj4wPC9zdWI+5ZCR6KW/5YGa5YeP6YCf6L+Q5Yqo77yM6YCf5bqm5YeP5Li66Zu25LmL5ZCO77yM5YaN5ZCR5Lic5YGa5Yqg6YCf6L+Q5Yqo
- 提示2：IOS5mei9puS4reeahOS5mOWuouS7peS5mei9puS4uuWPguiAg+ezu++8jOebuOW9k+S6juS5mei9pumdmeatouS4jeWKqO+8jOeUsui9puS7peWInemAn+W6pjxpPnY8L2k+PHN1Yj4wPC9zdWI+5ZCR5Lic5YGa5YeP6YCf6L+Q5Yqo77yM6YCf5bqm5YeP5Li66Zu25LmL5ZCO77yM5YaN5ZCR6KW/5YGa5Yqg6YCf6L+Q5Yqo
- 答案：QQ==
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本课配套习题挑战模式3/5
单选题
难度系数：
3.在平直公路上，自行车与同方向行驶的一辆汽车在t=0时同时经过某一个路标，它们的位移随时间变化的规律为：汽车x=10t-t2，自行车x=5t，(x的单位为m，t的单位为s)，则下列说法正确的是
| A: 汽车做匀加速直线运动，自行车做匀速直线运动 |
| B: 经过路标后的较短时间内自行车在前，汽车在后 |
| C: 在t=2.5 s时，自行车和汽车相距最远 |
| D: 当两者再次同时经过同一位置时，它们距路标12.5 m |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUseaxvei9puWSjOiHquihjOi9puS9jeenu+maj+aXtumXtOWPmOWMlueahOinhOW+i+efpe+8jOaxvei9puWBmuWMgOWHj+mAn+i/kOWKqA==
- 提示2：IOiHquihjOi9puWBmuWMgOmAn+ebtOe6v+i/kOWKqA==
- 答案：Qw==
55Sx5rG96L2m5ZKM6Ieq6KGM6L2m5L2N56e76ZqP5pe26Ze05Y+Y5YyW55qE6KeE5b6L55+l77yM5rG96L2m5YGa5YyA5YeP6YCf6L+Q5Yqo77yMdjA9MTAgbS9z77yMYT0tMiBtL3My77yM6Ieq6KGM6L2m5YGa5YyA6YCf55u057q/6L+Q5Yqo77yMdj01IG0vc++8jOaVhUHjgIFC6ZSZ6K+vLuW9k+axvei9pumAn+W6puWSjOiHquihjOi9pumAn+W6puebuOetieaXtu+8jOebuOi3neacgOi/nC7moLnmja52PXYwK2F077yMdD0yLjUgc++8jEPmraPnoa4u5b2T5Lik6L2m5L2N56e755u4562J5pe25YaN5qyh57uP6L+H5ZCM5LiA5L2N572uLOaVhTEwdOKAsi104oCyMj01dOKAsizop6Plvpd04oCyPTUgcyx4PTI1IG3vvIzmlYVE6ZSZ6K+v
本课配套习题挑战模式4/5
单选题
难度系数：
4.从同一地点同时开始沿同一直线运动的两个物体Ⅰ、Ⅱ的速度—时间图象如图所示. 在0～t2时间内，下列说法中正确的是
| A: Ⅰ物体所受的合外力不断增大，Ⅱ物体所受的合外力不断减小 |
| B: 在第一次相遇之前，t1时刻两物体相距最远 |
| C: t2时刻两物体相遇 |
D: Ⅰ、Ⅱ两个物体的平均速度大小都是 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOmAn+W6puKAlOaXtumXtOWbvuixoeS4reKFoOeJqeS9k+eahOaWnOeOh+mAkOa4kOWHj+Wwj++8jOWNs+KFoOeJqeS9k+eahOWKoOmAn+W6pumAkOa4kOWHj+Wwjw==
- 提示2：IOWcqDDvvZ48aT50PC9pPjxzdWI+MTwvc3ViPuaXtumXtOWGhe+8jOKFoeeJqeS9k+eahOmAn+W6puWni+e7iOWkp+S6juKFoOeJqeS9k+eahOmAn+W6pg==
- 提示3：IOWcqOmAn+W6puKAlOaXtumXtOWbvuixoeS4reWbvue6v+S4juWdkOagh+i9tOaJgOWbtOmdouenr+ihqOekuuS9jeenuw==
- 答案：Qg==
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
本课配套习题挑战模式5/5
多选题
难度系数：
5.甲、乙两物体相距s，同时同向沿同一直线运动，甲在前面做初速度为零、加速度为a1的匀加速直线运动，乙在后做初速度为υ0，加速度为a2的匀加速直线运动，则
| A: 若a1＝a2，则两物体可能相遇一次 |
| B: 若a1＞a2，则两物体可能相遇二次 |
| C: 若a1＜a2，则两物体可能相遇二次 |
| D: 若a1＞a2，则两物体也可相遇一次或不相遇 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOiuvuWHuuS5mei/veS4iueUsueahOaXtumXtOS4ujxpPnQ8L2k+
- 提示2：IOazqOaEj+eBtea0u+i/kOeUqOaVsOWtpuaWueazle+8jOWmguS6jOWFg+S4gOasoeaWueeoi+KWs+WIpOWIq+W8jw==
- 答案：QSxCLEQ=
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