Broken eggs, toilet paper and inertia:

Broken eggs, toilet paper and inertia:

Guiding question: How can Newton’s first law predict the motion of objects?  

Key Concept: Forces 

Related Concepts: Inertia, mass, weight

Generalization: Objects in motion stay in motion while objects at rest stay at rest unless acted on by an outside force.  

The 8th Grade MYP 3 class jumped right back into the swing of things last week as they began to explore Newton’s Laws, forces, work, energy, power, and eventually simple machines. As many of them had heard before, and you may also know, Newton’s first law states, “an object in motion stays in motion and an object at rest stays at rest unless acted upon by an outside force.” This is also known as Newton’s Law of Inertia. As the students learned, inertia is the laziness of an object.  

To demonstrate Newton’s law of inertia students explored several demos that were set up in the new amazing physics lab. There was a 20 kg mass on the table that didn’t want to move (high inertia), the classic table setting with tablecloth demo, eggs miraculously falling into water glasses, the tennis ball head gear, and the how to properly tear off toilet paper demo.  

The learning that occurred is something that will stay with the students forever, and the expressions of triumph and celebration after mastering one of the demos was extremely exciting. See the video for more! 





中学8年级的学生上周很快就投入到学习中,他们开始探究牛顿定律、力、功、能,最终关于小型机器装置。和您一样,大多数人以前已经知道牛顿的第一定律:“任何物体都要保持匀速直线运动或静止状态,直到外力迫使它改变运动状态为止。”这也被称之为惯性定律。学生们了解到,惯性就是物体 怠惰的性质。


为了直观地表现惯性定律,学生们在学校布置一新的物理实验室里做了多个惯性实验。其中有一个重达20公斤的物体放置于桌子上,但不想移动;一个从餐具下抽出桌布的实验,一个鸡蛋神奇地坠入水瓶的实验, 网球做的头部装置,以及如何正确撕下卫生纸实验。



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