| Murasaki Hiroshi - Newton's Laws of Motion |
| 1 | Foundation of dynamics They show the breadth, The simplicity of principles of nature they apply almost everywhere. Even between you and me Dynamics: it’s the study of causes For objects and systems to move Come here, Push or pull me Be my force Make me shift Newton’s first law of motion: There must be a cause, an external force, for any change in velocity, magnitude verse or direction Otherwise, it won’t vary The speed is constant And zero is a constant too In simple words: Inertia: an object will stay In rest or in motion Until a force is applied Are we moving now? Is there any force between us? The more massive the object The bigger the inertia Would you try to defeat it? I can catch you, I can make you stop. You can change my direction, You can change my intensity. Newton’s second law of motion: It explains a cause, a change in motion. the relationship between our bodies, maybe? Come closer, look at this equation You may use it to calculate Force’s role in a situation Now, repeat with me Force, mass, and acceleration F=ma Push me with your mass, Pull me, with your arms Make my body accelerate Back and forth You’re moving too, right? Let’s see what happens When our bodies meet Newton’s Third Law of Motion: If an object T / like Teacher Exerts a force R / like Ruler On an object S / like Student Now pay attention: S will exert a force Equal in magnitude Opposite in direction One against other A body can’t exert a force, Without experiencing the same Action and reaction, This means that forces result From interactions, don’t you agree? These are Newton’s laws of motion They describe the relativity Between forces acting on bodies And their motion, as result But we need to stop now You need to rest, Newton’s first and third law Close your eyes on my chest. |
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