1.单选题- (共11题)
a
| A．Fsinθ | B．Fcosθ | C．μ（Fsinθ－mg） | D．μ（mg－Fsinθ） |
| A．8N，方向向右 | B．8N，方向向左 |
| C．2N，方向向右 | D．2N，方向向左 |
的斜面上，放一质量为
的小球，小球被竖直的木板挡住，不计摩擦，则小球对木板的压力是（）
2.选择题- (共7题)
阅读理解
One day, Justin decided to spend the holiday with his old friend Andrew in Australia. Their plane arrived in Sydney at ten in the morning. They had a good rest in a hotel. The next morning they rented(租)a car and began their travel. Justin found a river and they drove the car there quickly. Soon they got to the river. Before they jumped into the water, Andrew saw a boy playing under a big tree. He asked, “Are there any crocodiles(鳄鱼)in the river? ”“No, there aren’t, ”answered the boy. So they began to swim in the river. After a while, Justin felt something hit against(撞击)his leg. He told Andrew about it. They were afraid and stopped swimming. Andrew asked the boy loudly, “Is it true that there aren’t any crocodiles in the river? ”
“Yes, sir, ”said the boy, “But there are many sharks(鲨鱼)in the river. ”
阅读理解
One day, Justin decided to spend the holiday with his old friend Andrew in Australia. Their plane arrived in Sydney at ten in the morning. They had a good rest in a hotel. The next morning they rented(租)a car and began their travel. Justin found a river and they drove the car there quickly. Soon they got to the river. Before they jumped into the water, Andrew saw a boy playing under a big tree. He asked, “Are there any crocodiles(鳄鱼)in the river? ”“No, there aren’t, ”answered the boy. So they began to swim in the river. After a while, Justin felt something hit against(撞击)his leg. He told Andrew about it. They were afraid and stopped swimming. Andrew asked the boy loudly, “Is it true that there aren’t any crocodiles in the river? ”
“Yes, sir, ”said the boy, “But there are many sharks(鲨鱼)in the river. ”
阅读理解
One day, Justin decided to spend the holiday with his old friend Andrew in Australia. Their plane arrived in Sydney at ten in the morning. They had a good rest in a hotel. The next morning they rented(租)a car and began their travel. Justin found a river and they drove the car there quickly. Soon they got to the river. Before they jumped into the water, Andrew saw a boy playing under a big tree. He asked, “Are there any crocodiles(鳄鱼)in the river? ”“No, there aren’t, ”answered the boy. So they began to swim in the river. After a while, Justin felt something hit against(撞击)his leg. He told Andrew about it. They were afraid and stopped swimming. Andrew asked the boy loudly, “Is it true that there aren’t any crocodiles in the river? ”
“Yes, sir, ”said the boy, “But there are many sharks(鲨鱼)in the river. ”
3.多选题- (共3题)
| A．地面对A的支持力是30N | B．地面对A的支持力是20N |
| C．测力计示数20N | D．测力计示数30N |
| A．物体运动时，物体一定不处于平衡状态 |
| B．运动的物体也可能处于平衡状态 |
| C．物体处于平衡状态时，物体一定静止不动 |
| D．物体保持静止或者匀速直线运动状态都叫做平衡状态 |
| A．地面对运动员的支持力跟运动员对地面的压力是一对作用力与反作用力 |
| B．地面对运动员的支持力大于运动员对地面的压力 |
| C．地面对运动员的支持力大于运动员的重力 |
| D．地面对运动员的支持力跟运动员对地面的压力的合力大于运动员的重力 |
4.填空题- (共1题)
5.解答题- (共4题)
（1）将弹簧沿水平方向拉长3cm时，物体受到地面的摩擦力是多少？
（2）将弹簧沿水平方向拉长5cm时，物体受到地面的摩擦力是多少？
6.实验题- (共1题)
-
【1】题量占比
单选题:(11道)
选择题:(7道)
多选题:(3道)
填空题:(1道)
解答题:(4道)
实验题:(1道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：7
7星难题：0
8星难题：8
9星难题：5