1.单选题- (共4题)
| A．a点和c点的向心加速度大小相等 | B．b点和c点的线速度大小相等 |
| C．a点和c点的线速度大小相等 | D．a点和b点的角速度大小相等 |
| A．它是人造地球卫星绕地球飞行的最小速度 |
| B．它是使卫星进入近地圆轨道的最大发射速度 |
| C．它是近地圆轨道上人造地球卫星的运行速度 |
| D．它是卫星在椭圆轨道上运行时在远地点的速度 |
| A．不断增大牵引力和牵引力的功率 |
| B．不断减小牵引力和牵引力的功率 |
| C．保持牵引力不变，不断增大牵引力功率 |
| D．不能判断牵引力功率怎样变化 |
2.选择题- (共3题)
阅读短文，根据短文内容从各题所给的四个选项中选择最佳选项。
When I was twelve years old, I went with my dad to his work — a car showroom. I was walking 1 carelessly and saw a poor woman with a child beside her standing outside the showroom. I saw that she was crying and went inside to tell my father. He went out and asked the woman to come into the 2. He offered her some water and then asked her what was wrong.
The woman said that her 3 had died and she didn't have anyone else in her family who could help her. She did some manual (体力的) labor to earn some money to take care of her daughter but the child was 4 for the last three days and she was unable to go to work. Now she didn't have a grain of food to eat. While she was telling this story to my father, she was unable to control her emotions (情绪) and started 5 again. My father and I were deeply moved by her story.
We got some food for her and her child. My father then took them to the nearest 6 for her child to be treated as she did not seem to be very well. On the way, we 7 her a 5kg-bag of wheat from the market. My father gave her some money before we left. The lady was so grateful.
It is eight years later, but that event is still very 8 in my mind. My father's kindness to this woman moved me greatly and since then, I have 9 to try and walk a similar path and serve others. I'm happy to see so many other people in this world are also ready to help others when they meet people in 10. They have chosen to walk a service path also.
3.多选题- (共7题)
| A．运动的时间为2s |
| B．小物块对皮带做的总功为0 |
| C．小物块与传送带相对位移为1.5m |
| D．小物块与皮带之间因摩擦而产生的内能为3J |
| A．小球在最高点时对杆的作用力为零，只有重力提供小球的向心力 |
B．小球恰好通过最高点的临界速度是 |
| C．若增大小球的初速度，则在最高点时球对杆的力可能减小 |
| D．若增大小球的初速度，则在最高点时球对杆的力可能增大 |
水平抛出一小球，经过时间
恰好落在斜面底端，速度是v，不计空气阻力。下列说法正确的是
| A．若以速度2水平抛出小球，则落地时间大于 |
| B．若以速度2水平抛出小球，则落地时间等于 |
C．若以速度 水平抛出小球，则撞击斜面时速度方向与v成θ角 |
| D．若以速度 水平抛出小球，则撞击斜面时速度方向与v同向 |
| A．小球将沿半球表面做一段圆周运动后抛至C点 |
| B．小球将从B点开始做平抛运动到达C点 |
C．OC之间的距离为 |
| D．OC之间的距离为2R |
A. 由于地球比木星离太阳近，所以太阳对地球的引力一定比对木星的引力大
B. 行星绕太阳沿椭圆轨道运动时，在近日点所受引力大，在远日点所受引力小
C. 由F＝G
可知，G＝
，由此可见G与F和r2的乘积成正比，与M和m的乘积成反比D. 行星绕太阳运动的椭圆轨道可近似看作圆形轨道，其向心力来源于太阳对行星的引力
| A．下落过程，重力对两物体做的功相同 |
| B．下落过程，重力的平均功率相同 |
| C．到达底端时重力的瞬时功率PA＜PB |
| D．到达底端时两物体的速度相同 |
4.解答题- (共3题)
（1）摩托车在空中飞行的时间？
（2）摩托车的开始飞越壕沟的初速度至少要有多大？
(1)轻质弹簧的劲度系数k；
(2)物块A滑至b处，绳子断后瞬间，圆轨道对物块A的支持力大小；
(3)为了让物块A能进入圆轨道且不脱轨，则物体与水平轨道bc间的动摩擦因数μ应满足什么条件？
(1)该星球表面上的重力加速度g的大小.
(2)该星球的第一宇宙速度.
5.实验题- (共2题)
某同学在描绘中抛运动轨迹时，得到的部分轨迹曲线如图乙所示.在曲线上取A、B、C三个点，测量得到A、B、C三点间竖直距离
="10.20" cm，
=20.20cm，A、B、C三点同水平距离
=x=12.40cm，g取10m/s²，则物体平抛运动的初速度
的计算式为______________(用字母、、x和g表示)，代入数据得其大小为________m/s.
(1)已准备的器材有：打点计时器(带导线)、纸帶、复写纸、带铁夹的铁架台和带夹子的重物，此外还需要的器材是_______(填字母代号).
A.直流电源、天平及砝码
B.直流电源、毫米刻度尺
C.交流电源、天平及砝码
D.交流电源、毫米刻度尺
(2)安装好实验装置，正确进行实验操作，从打出的纸带中选出符合要求的纸带，如图2所示，图中0点为打点起始点，且速度为零。选取纸帚上打出的连续点A. B、C…作为计数点，测出其中E、F、G点距起始点O的距离分別为
、
、
.已知重锤质量为m，当地重力加速度为g，计时器打点周期为T.为了验证此实验过程中机械能是否守恒，需要计算出从0点到F点的过程中，重锺更力势能的减少量△Ep=__________，动能的增加量△Ek=_________(用题中所给字母表示).(3)某同学在实验中发现重锤增加的动能略小于重锤减少的重力势能，于是深入研究阻力对本实验的影响，若重锤所受阻力为f，重锤质量为m，重力加速度为g.他测出各计数点到起始点的距离h，并计算出各计数点的速度v，用实验测得的数据绘制出v²-h图线，如图3所示，图象是一条直线，此直线斜率k=______(用题中字母表示).
-
【1】题量占比
单选题:(4道)
选择题:(3道)
多选题:(7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：5
5星难题：0
6星难题：5
7星难题：0
8星难题：6
9星难题：0