1.单选题- (共3题)

A.第3s末到第5s末A、B运动方向相反
B.物体A的加速度大于物体B的加速度
C.在前5s内A、B两物体位移之比为2∶1
D.第3s末到第5s末A、B两物体平均速度之比为1: 1

A.0 | B.mg |
C.3mg | D.5mg |

A.滑块下滑过程中只有重力做功,所以滑块的机械能守恒 |
B.滑块的机械能不守恒,所以它不可能上升到另一顶端 |
C.滑块下滑的过程中,滑块与容器的总动量守恒 |
D.滑块运动到最低点的速率等于![]() |
2.选择题- (共1题)
THIS is a story about a boy called Sparky. For Sparky, school was all but impossible. He failed every subject in the eighth grade. He got a zero in physics. It made him the worst physics student in the school's history. He didn't do much better in sports. He made the school golf team, but lost the only important match of the season.
He didn't have friends, either. Other kids didn't care about him. If a classmate said “hello” to Sparky outside of school, he would feel very surprised. There's no way to tell how he might have done at dating(约会). Sparky never once asked a girl to go out in high school. He was too afraid of being turned down.
He was a loser(失败者), and he and his classmates knew it. But, somehow, he decided to keep trying. The only thing important in his life was drawing. He was proud of his ability even though no one else appreciated it. He submitted(递交) some cartoons for his high school yearbook, but they were rejected.
After completing high school he wrote a letter to the Walt Disney Studios. He was told to submit some samples. He spent a great deal of time on the drawings. They were rejected. Another loss for the loser.
So Sparky decided to write his own auto biography(自传) in cartoons. He created his childhood self – a little-boy loser: Charlie. He never succeeded in kicking a football and never got a date with the little red-haired girl. Sparky, the boy who had such a lack of success in school and whose work was rejected again and again, was Charles Schulz. He created the Peanuts comic strip and the world-famous cartoon characters Charlie Brown and Snoopy.
3.多选题- (共2题)

A.若v1=v2,则A、B间无滑动摩擦力。 |
B.若v1>v2,则B对A有向右的滑动摩擦力。 |
C.若v1>v2,则A对B有向右的滑动摩擦力。 |
D.若v1<v2,则A对B有向右的滑动摩擦力。 |

A.若汽车到桥顶的压力为![]() ![]() |
B.若拱桥的半径一定,汽车行驶到桥顶的速度越大越安全 |
C.在汽车到桥顶的速度相同的情况下,拱桥的半径越大,汽车越安全 |
D.若拱桥的半径增大到与地球半径相同,汽车要在桥顶上腾空,速度至少为7.9km/s |
4.填空题- (共2题)


5.解答题- (共3题)
②逆着毛的生长方向运动时会受到来自毛皮的滑动摩擦力。

(1)物体上滑时,是顺着毛的生长方向运动,求物体向上运动时的加速度
(2)一物体自斜面底端以初速度v0=2m/s冲上足够长的斜面,斜面的倾角θ=30o,过了t=1.2s物体回到出发点。若认为毛皮产生滑动摩擦力时,动摩擦因数μ为定值,试计算μ的数值。(g=10m/s2)

(1)弹簧的最大弹性势能;
(2)滑块C的最大动能。

(1)铁球开始运动时的初速度是多少
(2)若木板的质量为M,木板开始运动后弹簧的弹性势能最大是多少?
6.实验题- (共2题)

(1)实验前,在进行平衡摩擦力的操作时,下列注意事项正确的是(_______)
A.应该让小车连接纸带并穿过打点计时器 |
B.必须让小车连接沙桶 |
C.纸带和沙桶都应连接 |
D.纸带和沙桶都不能连接 |


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【1】题量占比
单选题:(3道)
选择题:(1道)
多选题:(2道)
填空题:(2道)
解答题:(3道)
实验题:(2道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:3
7星难题:0
8星难题:7
9星难题:1