1.单选题- (共7题)
| A．在空中斜向上飞行的足球一定受到一个向前的力作用 |
| B．作用在物体上的合外力不为零，物体的瞬时速度可能为零 |
| C．质量一定的物体受到的合力越大速度越大 |
| D．物体运动速度的方向总跟合外力的方向一致 |
| A．两个力的合力，可能比这两个分力都小 |
| B．已知合力及一个分力的大小和方向，求另一个分力有唯一解 |
| C．3N、4N、6N三个共点力最大合力为13N，最小合力为0N |
| D．静止在斜面上的物体的重力，可以分解为一个使物体沿斜面下滑的力，另一个是物体对斜面的压力 |
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（）
| A．小物块受到的摩擦力方向平行斜面向下 |
| B．小物块受到的滑动摩擦力大小为ma |
C．小物块受到的静摩擦力大小为 mg+ma |
| D．小物块受到斜面的弹力大小mg |
方向水平，第二次拉力
与水平成
角斜向上拉。在此过程中，两力的平均功率为
和
，则（ ）
A． | B． | C． | D．无法判断 |
2.选择题- (共3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4题)
| A．物块A相对小车仍静止 |
| B．物块A受到的弹簧弹力将变大 |
| C．物块A受到的摩擦力将减小 |
| D．物块A受到的摩擦力将增大 |
| A．在两次作用过程中，物体的加速度的大小相等 |
B．在两次作用过程中， |
C．在两次作用过程中， |
D．在两次作用过程中， |
| A．在0~5s内，观光电梯在加速上升，该同学处于失重状态 |
| B．在5s~10s内，该同学对电梯底板的压力等于他所受的重力 |
| C．在10s~20s内，观光电梯在减速下降，说明该同学的惯性在变小 |
| D．在20s~25s内，观光电梯在加速下降，该同学处于失重状态 |
| A．从抛出到刚着地，重力对两球所做的功相等 |
| B．从抛出到刚着地，重力分别对两球做的总功都是正功 |
| C．从抛出到刚着地，重力对两球的平均功率相等 |
| D．两球刚着地时，重力的瞬时功率相等 |
4.填空题- (共1题)
的，长为
的光滑固定斜面顶端从静止滑到底端，该过程物体重力的平均功率为_____W，滑到底端时重力的瞬时功率为______W. (
，取
)5.解答题- (共3题)
，与P相连的细绳通过光滑的滑轮挂了一个重物Q拉住物体P，重物Q的重量为
，此时两物体保持静止状态，绳与水平方向成
角，则物体P 受到地面对它的摩擦力
与地面对它的支持力
各为多大？
)。求：(1)放上小物块瞬间，小物块与小车的加速度大小；
(2)经多长时间两者达到相同的速度；
(3)从小物块放上小车开始，经过t=2s小物块通过的位移大小.
。求：(1)物体受拉力F作用下加速上升的距离？
(2)撤去拉力后物体向上运动的时间？
6.实验题- (共2题)
、
、F、
中不是由弹簧测力计测得的力是_____(填字母)。若AO与共线，BO与F共线，则被拉伸的橡皮筋的方向应为______(填AO或BO)。在该实验中需要记录和观察的是_____
| A．记录、、F的大小和方向 |
| B．记录、的夹角 |
| C．观察、的大小是否匝误差允许范围内相同 |
| D．观察F、的大小和方向是否在误差允许范围内相同 |
(1)该实验应采用__________法，在探究加速度a与物体质量m关系时，应保持_________不变(选填“砂和砂桶质量”或“小车质量”)，同时实验还要求砂和砂桶质量_________小车质量(选填“远大于”或“远小于”)。
图乙为某次实验用打点计时器测得的纸带，已知交流电的频率为50Hz，根据纸带可求出小车的加速度大小为________
。(保留两位有效数字)(2)在利用打点计时器和小车来做“探究加速度a跟F、m之间关系”的实验时，下列说法中正确的是______
| A．连接砝码盘和小车的细绳应跟长木板保持平行 |
| B．平衡摩擦力时，应将砝码盘及盘内砝码通过定滑轮拴在小车上 |
| C．小车释放前应靠近打点计时器，且应先接通电源再释放小车 |
| D．平衡摩擦力后，若改变小车和砝码的总质量后需要重新平衡摩擦力 |
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【1】题量占比
单选题:(7道)
选择题:(3道)
多选题:(4道)
填空题:(1道)
解答题:(3道)
实验题:(2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：2