SPM 物理複習 KSSM課程 Form 4 Chapter 2 Force and Motion I

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@NorthPhysics 3 жыл бұрын

0:00 Introduction 0:51 Distance & Displacement, Speed & Velocity (Constant Speed or Velocity), and Acceleration 3:42 Ticker timer 14:10 Equations of motion related to constant acceleration 16:40 Motion Graphs (s-t, v-t and a-t) 39:20 Gravity and Vertical Motion due to Gravity 44:23 Newton's first law of motion and Inertia 52:59 Newton's second and third law of motion 55:22 Momentum and principle of conservation of momentum 1:02:48 Impulse and Impulsive Force

@NorthPhysics 3 жыл бұрын

SPM于2021年开始第一年以KSSM课程考试，所以本频道即将把每一章做成Revision Video，方便各位学生学习。由于做video需要时间，如果各位要先看一看各个章节的内容，可以先对应回2020 SPM Revision. 对应的章节如下： Form 4 Chapter 1: (已完成) Form 4 Chapter 2: (已完成) Form 4 Chapter 3: (已完成) Form 4 Chapter 4: (已完成) Form 4 Chapter 5: (已完成) Form 4 Chapter 6: (已完成) Form 5 Chapter 1:(已完成) Form 5 Chapter 2: (已完成) Form 5 Chapter 3: (已完成) Form 5 Chapter 4: kzbin.info/www/bejne/r6eol4J-jd51ZsU Form 5 Chapter 5: kzbin.info/www/bejne/o3LNiYqkfqdnpNk & kzbin.info/www/bejne/oHTXlomjpNFgl5Y & kzbin.info/www/bejne/eouzYalqdpp_ma8 Form 5 Chapter 6: kzbin.info/www/bejne/oomqYXprdrOqjbs Form 5 Chapter 7: 新课程

@raidenshotgun5993 3 жыл бұрын

teacher you are better than tution !

@NorthPhysics 3 жыл бұрын

thanks for your appreciation!!

@小老师-b1n 3 жыл бұрын

我终于等到了🤗

@NorthPhysics 3 жыл бұрын

不好意思，久等了

@lyeqianxingmoe-2973 Жыл бұрын

老师全部formula的mass都是用gram啊？

@NorthPhysics Жыл бұрын

@happyoneperson 2 жыл бұрын

老师，Q6和Q7我不明白，可以清楚说什么时候用哪个equation吗？

@user-hi7pg2bp5u 2 жыл бұрын

总共有5个variables, 分别为 u,v,a,s,t 而下面4个linear equation 里面: 1. 𝑣 = 𝑢 + 𝑎𝑡 2. 𝑣2 = u2 + 2as 3. 𝑠 = 1/2(𝑢 + 𝑣)𝑡 4. 𝑠 = 𝑢𝑡 + 1/2at2 你会注意到每个linear equation各别只会有其中4个variables罢了第六题从题目中得到的资料有 s=100m u=0m/s (at rest) a=2ms-2 要找t, 你就看以上方程式里哪个'有齐' s,u,a,t 的就用那个(第4个). 其他题目也一样,依据题目给的资讯和要找什么来判断.

@wafuiyoh9643 2 жыл бұрын

老师请问在 38:04 为什么deceleration 不是positive 4 是-4， acceleration是减4吗？

@NorthPhysics 2 жыл бұрын

那个是acceleration的大小，所以我写 negative 4。不过，deceleration or acceleration 其实是要看方向的。例如: t=20 s to 25 s, acceleration 是 negative 2, 但是他是accelerate at the negative direction 反方向加速。