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【2026版高中物理粤教版必修一册学习笔记练透word培优讲义作业38力学单位

【2026版高中物理粤教版必修一册学习笔记练透word培优讲义作业38力学单位

(分值:60分)

1~6题每题5分,共30

考点一对单位制的理解

1.(多选)关于国际单位制,下列说法正确的是(  )

A.国际单位制是世界各国统一使用的一种通用的单位制

B.各国均有不同的单位制,国际单位制是为了方便交流而采用的一种单位制

C.国际单位制是一种基本的单位制,只要在物理运算中各物理量均采用国际单位制中的单位,则最后得出的结果的单位必然是国际单位制中的单位

D.国际单位制中的基本单位所对应的物理量有长度、能量、时间

2.2023·普宁市高一期末)关于力学单位制,下列说法正确的是(  )

A.厘米、米/秒、牛顿都是导出单位

B.千克、米、秒都是基本单位

C.在国际单位制中,长度的单位可以是米,也可以是厘米

D.牛顿第二定律的表达式F=ma,在任何单位制中都成立

3.2021·海南卷)公元前4世纪末,我国的《墨经》中提到力,形之所以奋也,意为力是使有形之物突进或加速运动的原因。力的单位用国际单位制的基本单位符号来表示,正确的是(  )

A.kg·m·s-1B.kg·m·s-2

C.Pa·m2D.J·m-1

考点二单位制的应用

4.一物体在2 N的外力作用下,产生10 cm/s2的加速度,求该物体的质量。下列几种不同的求法,其中单位运用正确、简洁而又规范的是(  )

A.m== kg=0.2 kg

B.m===20 =20 kg

C.m== kg=20 kg

D.m===20 kg

5.在国际单位制中,某物体运动时间可以表示为t=gaxb,其中g表示重力加速度,x表示长度,ab为常数,根据力学单位制,下列表示正确的是(  )

A.a=1,b=1B.a=-=

C.a==-D.a=2,b=2

6.2023·湛江市高一期末)轿车的加速度大小是衡量轿车加速性能的一项重要指标。近来,一些高级轿车的设计师在关注轿车加速度的同时,提出了一个新的概念,叫作加速度的变化率,用加速度的变化率这一新的概念来描述轿车加速度随时间变化的快慢,并认为,轿车的加速度变化率越小,乘坐轿车的人感觉越舒适。下面四个单位中,适合做加速度的变化率单位的是(  )

A.m/sB.m/s2

C.m/s3D.m2/s3

78分,813分,共21

7.(多选)用国际单位制验证下列表达式,其中可能正确的是(  )

A.s=ats为位移、a为加速度、t为时间)

B.a=μga为加速度、μ为动摩擦因数、g为重力加速度)

C.F=mF为作用力、m为质量、v为速度、R为半径)

D.v=v为速度、R为半径、g为重力加速度)

8.(13分)一质量为103 t的列车的车牵引力为3.5×105 N,列车运动中所受阻力为车重的。列车由静止开始做匀加速直线运动,速度变为180 km/h需多长时间?此过程中前进的距离为多大?(g取10 m/s2

9分)

9.因受空气污染和氧化等因素影响,国际千克原器的质量出现细微变化,已难以适应现代精密测量要求。因此科学界一直想用一种基于物理常数的定义来取代。2018年11月16日,第26届国际计量大会决定,千克由普朗克常量h及米和秒定义,即1 kg=,该决定已于2019年5月20日生效。此次标准实施后,国际单位中7个基本单位全部建立在不变的自然常数基础上,保证了国际单位的长期稳定性和通用性。以下说法正确的是(  )

A.普朗克常量h是个无单位的常量

B.普朗克常量h的单位等效于N·m·s

C.普朗克常量h的单位等效于N·m·s-1

D.受外界因素的影响,普朗克常量h的数值也会发生细微变化 

通过网盘分享的文件:word讲义

链接: https://pan.baidu.com/s/1ApPu4Bf1G3WQmBT-14h94g?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.000631s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000857s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000343s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000255s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000492s ]
  6. SELECT * FROM `set` [ RunTime:0.000222s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000601s ]
  8. SELECT * FROM `article` WHERE `id` = 482738 LIMIT 1 [ RunTime:0.000490s ]
  9. UPDATE `article` SET `lasttime` = 1775225426 WHERE `id` = 482738 [ RunTime:0.037715s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000365s ]
  11. SELECT * FROM `article` WHERE `id` < 482738 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000594s ]
  12. SELECT * FROM `article` WHERE `id` > 482738 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.008438s ]
  13. SELECT * FROM `article` WHERE `id` < 482738 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000748s ]
  14. SELECT * FROM `article` WHERE `id` < 482738 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000848s ]
  15. SELECT * FROM `article` WHERE `id` < 482738 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000933s ]
0.160460s