1/4单选题
难度：
1.
如图所示，在倾角为
的固定光滑斜面上，有一用绳子拴着的长木板，木板上站着一只猫. 木板质量是猫的质量的
倍. 当绳子突然断开时，猫立即沿着板向上跑，以保持其相对斜面的位置不变，则此时木板沿斜面下滑的加速度为（ ）
如图所示，在倾角为的固定光滑斜面上，有一用绳子拴着的长木板，木板上站着一只猫. 木板质量是猫的质量的倍. 当绳子突然断开时，猫立即沿着板向上跑，以保持其相对斜面的位置不变，则此时木板沿斜面下滑的加速度为（ ） | A |  |
| B |  |
| C |  |
| D |  |
正确答案：Qw==
54mb6aG/56ys5LqM5a6a5b6L
2/4单选题
难度：
2.质量不计的弹簧下端固定一小球. 现手持弹簧上端使小球随手在竖直方向上以同样大小的加速度
（
）分别向上、向下做匀加速直线运动. 若忽略空气阻力，弹簧的伸长分别为
；若空气阻力不能忽略且大小恒定，弹簧的伸长分别为
、
. 则（ ）
（）分别向上、向下做匀加速直线运动. 若忽略空气阻力，弹簧的伸长分别为；若空气阻力不能忽略且大小恒定，弹簧的伸长分别为、. 则（ ） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOW/veeVpeepuuawlOmYu+WKm+Wwj+eQg+WQkeS4iui/kOWKqOaXtu+8jOeUseeJm+mhv+esrOS6jOWumuW+i+aciTxpbWcgd2lkdGg9NzUgaGVpZ2h0PTM5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQzIvckJBQ0UxT1ROSW55MGRkUUFBQUMwRk9OOHVNMTk0LnBuZyI+77yM6Kej5b6XPGltZyB3aWR0aD04MSBoZWlnaHQ9Mzkgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85Ny9DMi9yQkFDRTFPVE5Jbml3ODZLQUFBRER3eTZkNGs0MDkucG5nIj4=
- 提示2：
- 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
正确答案：Qw==
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
3/4多选题
难度：
3.
如图所示，是做直线运动的物体受力
与受力后位移
的关系图，则从图可知（ ）
如图所示，是做直线运动的物体受力与受力后位移的关系图，则从图可知（ ） | A | 这物体至位移 时的速度最小 |
| B | 这物体至位移 时的加速度最大 |
| C | 这物体至位移后便开始返回运动 |
| D | 这物体至位移时的速度最大 |
- 提示1：
- IOeUsemimOWbvuWPr+efpe+8jOWKm+eahOaWueWQkeWni+e7iOi3n+S9jeenu+eahOaWueWQkeebuOWQjO+8jOaJgOS7peeJqeS9k+Wni+e7iOWBmuWKoOmAn+i/kOWKqA==
- 提示2：
- IOWcqOS9jeenuzxpbWcgd2lkdGg9MTcgaGVpZ2h0PTIzIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNUIvQjYvckJBQ0ZGT1ROSS14X1lvTEFBQUJPaWpUVVpBNjE0LnBuZyI+5aSE77yM54mp5L2T55qE6YCf5bqm5pyA5aSn
正确答案：QixE
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
4/4单选题
难度：
4.
如图所示，底板光滑的小车上用两个量程为
、完全相同的弹簧秤甲和乙系住一个质量为
的物块. 在水平地面上，当小车做匀速直线运动时，两弹簧秤的示数均为
；当小车做匀加速直线运动时，弹簧秤甲的示数变为
. 这时小车运动的加速度大小是（）
如图所示，底板光滑的小车上用两个量程为、完全相同的弹簧秤甲和乙系住一个质量为的物块. 在水平地面上，当小车做匀速直线运动时，两弹簧秤的示数均为；当小车做匀加速直线运动时，弹簧秤甲的示数变为. 这时小车运动的加速度大小是（） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOW9k+Wwj+i9puWMgOmAn+i/kOWKqOaXtu+8jOS4pOW8ueewp+enpOeahOekuuaVsOWdh+S4ujxpbWcgd2lkdGg9MzAgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNUIvQjYvckJBQ0ZGT1ROSlBpaDMwLUFBQUJnbXFEaVlRMDA2LnBuZyI+77yM5ZCI5Yqb5Li66Zu2
- 提示2：
- IOW9k+Wwj+i9puWMgOWKoOmAn+i/kOWKqOaXtu+8jOeUsueahOekuuaVsOS4ujxpbWcgd2lkdGg9MjQgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQzIvckJBQ0UxT1ROSlB4eGQ0OUFBQUJoZ1M4cFdNMzU2LnBuZyI+77yM6ICM55Sx5LqO5bCP6L2m6ZW/5bqm5LiN5Y+Y77yM5YiZ55Sy5by557Cn55qE5b2i5Y+Y55qE5Y+Y5YyW6YeP5LiO5LmZ5b+F55u4562J
正确答案：Qg==
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