中学生网络课堂
、
，劲度系数皆为
，悬挂的重物的质量分别为
和
. 若不计弹簧质量，取
，则平衡时弹簧
，
，本课配套习题挑战模式2/4
单选题
难度系数：
2.
和
，得到弹力与弹簧长度的图象如图所示. 下列表述正确的是（ ）
和，得到弹力与弹簧长度的图象如图所示. 下列表述正确的是（ ） A: 的原长比的长 |
| B:的劲度系数比的大 |
| C:的劲度系数比的小 |
| D: 测得的弹力与弹簧的长度成正比 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWbvuixoeS4reeahOaWnOeOh+ihqOekuuWKsuW6puezu+aVsA==
- 提示2：IOWbvuixoeS4jjxpbWcgd2lkdGg9MTAgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOG5pcXgxUUFBQUJFUWtqRDU0OTc5LnBuZyI+6L2055qE5Lqk54K56KGo56S65Y6f6ZW/
- 答案：Qg==
5Zu+6LGh5Lit55qE5pac546H6KGo56S65Yqy5bqm57O75pWw77yM5Y+v55+lYeeahOWKsuW6puezu+aVsOavlGLnmoTlpKcuIOWbvuixoeS4jjxpbWcgd2lkdGg9MTAgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOG5pcXgxUUFBQUJFUWtqRDU0OTc5LnBuZyI+6L2055qE5Lqk54K56KGo56S65Y6f6ZW/77yM5YiZYeeahOWOn+mVv+avlGLnmoTnn60uIA==
本课配套习题挑战模式3/4
多选题
难度系数：
3.
如图所示，
、
、
为三个物体，
、
为两个轻质弹簧、
为跨过光滑定滑轮的轻绳，它们连接如图所示并处于平衡状态，下列说法正确的是（ ）
如图所示，、、为三个物体，、为两个轻质弹簧、为跨过光滑定滑轮的轻绳，它们连接如图所示并处于平衡状态，下列说法正确的是（ ） | A: 有可能处于拉伸状态而处于压缩状态 |
| B: 有可能处于压缩状态而处于拉伸状态 |
| C: 有可能处于不伸不缩状态而处于拉伸状态 |
| D: 有可能处于拉伸状态而处于不伸不缩状态 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi9u+e7s+WPquiDveayv+e7s+S6p+eUn+WQkeS4iueahOaLieWKm+aIluS4jeS6p+eUn+WKm+eahOS9nOeUqC4g5Zug5q2k5by557CnPGltZyB3aWR0aD0xNyBoZWlnaHQ9MTkgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC81Qi9BNS9yQkFDRkZPVEw4X3dLSHdOQUFBQlgyak5TTW80MjAucG5nIj7lj6rlj6/og73ooqvmi4nkvLjmiJbkuI3kvLjkuI3nvKnogIzkuI3lj6/og73ooqvljovnvKku
- 提示2：IOiLpei9u+e7s+S4jeS6p+eUn+WKm+aIluS6p+eUn+eahOWQkeS4iuaLieWKm+Wwj+S6jueJqeWdlzxpbWcgd2lkdGg9MTQgaGVpZ2h0PTE0IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMODdnR0tkMkFBQUJGbmM1eHhzMDc2LnBuZyI+55qE6YeN5Yqb77yM5by557CnPGltZyB3aWR0aD0xOSBoZWlnaHQ9MTcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw4LWd1aWZKQUFBQmdoMTdzUlU5NjEucG5nIj7kuIDlrprmmK/ljovnvKnnirbmgIHogIzkuI3lj6/og73mmK/mi4nkvLjnirbmgIEu
- 提示3：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
- 答案：QSxE
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
本课配套习题挑战模式4/4
多选题
难度系数：
4.如图所示，质量为
的质点，与三根相同的螺旋形弹簧相连. 静止时，弹簧沿竖直方向，相邻两弹簧间的夹角均为
. 已知弹簧
对质点的作用力大小均为
，则弹簧对质点的作用力大小可能为
的质点，与三根相同的螺旋形弹簧相连. 静止时，弹簧沿竖直方向，相邻两弹簧间的夹角均为. 已知弹簧对质点的作用力大小均为，则弹簧对质点的作用力大小可能为 | A: |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi0qOeCueWPl+Wbm+S4quWKm+S9nOeUqO+8mumHjeWKmzxpbWcgd2lkdGg9MjQgaGVpZ2h0PTE3IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOU9BajVhZkFBQUJvR0hCd0FzNzAwLnBuZyI+77yMPGltZyB3aWR0aD01NCBoZWlnaHQ9MTkgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw5T1FTb0JCQUFBQnZGT3ZfTHc1NjYucG5nIj7nmoTlvLnlips8aW1nIHdpZHRoPTY4IGhlaWdodD0yMyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzk3L0IxL3JCQUNFMU9UTDlQRElrMGJBQUFDQVduLVVoNDc4OS5wbmciPg==
- 提示2：IOWbm+WKm+WQiOWKm+S4uumbtg==
- 答案：QSxCLEMsRA==
6LSo54K55Y+X5Zub5Liq5Yqb5L2c55So77ya6YeN5YqbPGltZyB3aWR0aD0yNCBoZWlnaHQ9MTcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw5T0FqNWFmQUFBQm9HSEJ3QXM3MDAucG5nIj7vvIw8aW1nIHdpZHRoPTU0IGhlaWdodD0xOSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzk3L0IxL3JCQUNFMU9UTDlPUVNvQkJBQUFCdkZPdl9MdzU2Ni5wbmciPueahOW8ueWKmzxpbWcgd2lkdGg9NjggaGVpZ2h0PTIzIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOVBESWswYkFBQUNBV24tVWg0Nzg5LnBuZyI+77yM5Zub5Yqb5ZCI5Yqb5Li66Zu277yM55Sx5LqO5by557CnPGltZyB3aWR0aD0zNCBoZWlnaHQ9MTkgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw5UERvbTAzQUFBQmlYWHlpcHM2MjAucG5nIj7lr7notKjngrnnmoTkvZznlKjlipvmlrnlkJHmnKrnn6XvvIzmlYXmnKzpopjmnInlpJrop6MuIDxicj7vvIgx77yJ5b2T5by557CnPGltZyB3aWR0aD0zNCBoZWlnaHQ9MTkgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw5UERvbTAzQUFBQmlYWHlpcHM2MjAucG5nIj7nmoTlvLnlipvmlrnlkJHlnYfmlpzlkJHkuIrml7bvvIzlm6DkuLrlpLnop5LnrYnkuo48aW1nIHdpZHRoPTMyIGhlaWdodD0xOSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzk3L0IxL3JCQUNFMU9UTDlQeklpbEhBQUFCbTJpNkluczQwNi5wbmciPu+8jOaVhTxpbWcgd2lkdGg9MzQgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOVBEb20wM0FBQUJpWFh5aXBzNjIwLnBuZyI+55qE5by55Yqb55qE5ZCI5Yqb5Lmf5Li6PGltZyB3aWR0aD0xNyBoZWlnaHQ9MTcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC81Qi9BNS9yQkFDRkZPVEw5UGk4MHF2QUFBQkxoSU9hMm8xMzUucG5nIj7vvIzmlrnlkJHnq5bnm7TlkJHkuIrvvIzlj4g8aW1nIHdpZHRoPTE5IGhlaWdodD0yMyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzVCL0E1L3JCQUNGRk9UTDlTUXRBRmRBQUFCVzM3WG9JczEyOS5wbmciPuaWueWQkeS5n+WQkeS4iuaXtu+8jOaciTxpbWcgd2lkdGg9NzUgaGVpZ2h0PTIzIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNUIvQTUvckJBQ0ZGT1RMOVRBdWpva0FBQUNVaEFMOEY0MDA1LnBuZyI+77yM5omA5LulPGltZyB3aWR0aD03NSBoZWlnaHQ9MjMgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC81Qi9BNS9yQkFDRkZPVEw5U2dVMGt1QUFBQ1N6V1I2TlkxMTcucG5nIj7vvIzmlYXpgInpoblE5q2j56GuLiA8YnI+77yIMu+8ieWmguaenDxpbWcgd2lkdGg9NTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOVNpaTBqa0FBQUNMMWpYMndrMTcyLnBuZyI+77yM5YiZPGltZyB3aWR0aD00NCBoZWlnaHQ9MjMgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw5VGh3azZuQUFBQmtXN3FTUkEwODUucG5nIj7vvIzpgInpoblB5q2j56GuLiA8YnI+77yIM++8ieW9kzxpbWcgd2lkdGg9MzQgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTcvQjEvckJBQ0UxT1RMOVBEb20wM0FBQUJpWFh5aXBzNjIwLnBuZyI+5by55Yqb55qE5ZCI5Yqb5pa55ZCR5ZCR5LiK77yMPGltZyB3aWR0aD0xOSBoZWlnaHQ9MjMgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC81Qi9BNS9yQkFDRkZPVEw5U1F0QUZkQUFBQlczN1hvSXMxMjkucG5nIj7mlrnlkJHlkJHkuIvml7bvvIw8aW1nIHdpZHRoPTc1IGhlaWdodD0yMyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzVCL0E1L3JCQUNGRk9UTDlUei1KZklBQUFDVndzRWlvYzM5Ny5wbmciPu+8jOaJgOS7pTxpbWcgd2lkdGg9NzUgaGVpZ2h0PTIzIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNUIvQTUvckJBQ0ZGT1RMOVNpQnNtN0FBQUNTSHFIOUdROTA4LnBuZyI+77yMQ+ato+ehri4gPGJyPu+8iDTvvInlvZM8aW1nIHdpZHRoPTM0IGhlaWdodD0xOSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzk3L0IxL3JCQUNFMU9UTDlQRG9tMDNBQUFCaVhYeWlwczYyMC5wbmciPuW8ueWKm+eahOWQiOWKm+aWueWQkeWQkeS4i++8jDxpbWcgd2lkdGg9MTkgaGVpZ2h0PTIzIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNUIvQTUvckJBQ0ZGT1RMOVNRdEFGZEFBQUJXMzdYb0lzMTI5LnBuZyI+5pa55ZCR5ZCR5LiK5pe277yMPGltZyB3aWR0aD03NSBoZWlnaHQ9MjMgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85Ny9CMS9yQkFDRTFPVEw5U1NySDZHQUFBQ1ZIOUpmZFkxNzkucG5nIj7vvIzmlYXpgInpoblC5q2j56GuLiA=
