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              教室里外走一走,走廊上跑一跑

              发布时间:2019-05-09 05:59:28责任编辑:高振中点击次数:60

              教室里外走一走,走廊上跑一跑

              ——这是加方物理课进行时

              Walking and Running Around inside Classrooms and Corridors

              This is the Physics 11 Class

              科学课怎么上最好? 切身体验!知识概念如何复习?亲身实践!

              What is the best vehicle to learn science? In-person experience. What is the best way to review the concepts and knowledge of science? Hands-on practice.

              五一假期前,高二物理课学习了“力”和“功”的概念。假期结束后,为避免学生们忘记了所学的知识,老师特别安排了一个特别的复习实验。

              After the May holiday, in case students forget the concepts of Force and Power that they learnt before leaving for the holiday, the science teachers have planned a special experiment for them.

              实验特别在哪里?

              Why is the experiment special?

              首先,学生们要以自己为实验对象!

              其次,这个实验过程会让女生们经历三次哀鸣!!!

              First, students need to complete this experiment by treating themselves as subjects. Second but not the least, nearly every girl needs to whine three times to complete the experiment process.

              到底发生了什么?在我们一探究竟前,先一起来学习点物理知识。

              先来点知识点介绍: 你的力量是你所做的功的总量除以所花费的时间。因此为了计算力量,你需要做功,而做功需要出力让物体移动一段距离。你的速度不会影响做功总量,但是速度越快,力量(功率)越大。

              Before investigation, let us review some of the physics knowledge: your power is a measure of the amount of work you do divided by the time it takes you to do it。Therefore, to calculate your power you need to do work. To do work you must apply a force to something and move that thing over a distance. How fast you do the work does not determine how much work you do but the faster you do the work the more powerful you are.

              本次实验设计:通过跑楼梯,计算出你要使出多少力来平衡重力来迈上楼梯,乘以整个跑动距离,除以你花费的时间,得出自己的强壮指数(功率)。

              Experiment: Find out how powerful you are by calculating the work you do and time you need to finish running up 4 floors. 

              实验第一步,哀鸣第一级:要知道自己需要出多少力来平衡自身的“重”力?你要先报出自己的……(体)重!

              Step One, Whine One: Want to Know the Force, You Need to Tell Your Weight.

              呜呜呜,女生们沸腾了。为什么做个科学实验,还要暴露自己的“隐私”?  Whines appeared. Why do we need to expose our privacy for science?

              有学生当场质疑:“老师,我不知道自己的体重!!!”

               ”What if we do not know(want to show) our weight?

              老师亲切地笑道:“不用担心,我早就想到了。来来来,电子体重秤都帮你准备好了,一会儿现场称…”

              The teacher presented the warmest smile to the girls. Then he lifted a weight scale in front the class,” Dont worry, you can measure yourself right here.

              哀鸣声顿时上升一级。老师你好狡猾。老师你的笑容看起来分明只有“奸诈”。  Whines raised up, Teacher, there is full of duplicity in your kind smile.

              面对此场景,一些女生默默在实验报告上写下了自己的体重数字。有的女生干脆就现场走上了体重秤,只听“啊~”一声。然后见她匆匆跑回座位,脱下外套,又急匆匆跑回称上。经过如此反复比较,她得出了明智的结论:穿枫叶校服外套称体重,能胖2斤。

              Some girls took down their weight on the lab sheet directly in silence while some other girls ran to the scale. The first girl of the latter group rushed back to her seat immediately after standing on the scale. She shook off her jacket then stood back onto scale again. By doing this, she reached the most important conclusion of the day: wearing a Maple Leaf jacket adds 1 kg to your weight.

              F=mg, now they know how much force would be needed in running the stairs.

                   得到体重数字后乘以常数g,我们就知道了自己的重力,也明白了每走一步楼梯,我们要使出多少力了。

              实验第二步, 哀鸣第二级:测量距离和时间,得出功和功率指数。

              Step Two, Whine Two: Measure the Distance and Time to Find Out the Power We Use in Running the Stairs.

                   距离很好测,量出每一阶楼梯的高度,数数一共多少台阶,彼此相乘就是距离。但是为了增加实验效率,每个学生要…尽自己最快的速度从一楼跑到四楼,还要标注出所使用的时间。而且为了实验准确,每个学生要…至少跑两次。Distance was an easy piece of work. The height of each stair multiplied by the number of stairs would tell the distance. But for the time part, students needed to run up 4 floors, and twice.

                 不是说好的科学课吗? 怎么还要搞体育? 加上数楼梯,要从一楼到四楼来回跑三次,呜呜呜,最讨论跑楼梯了。

                 刚纠结完自己的体重,就迎来了运动的压力。爱运动的女生立即冲出教室了,其他体育不好的学生还是会有点懵。但无论多么扭扭捏捏,陆陆续续,大家都和自己的搭档去走廊冲刺了。”

              Isn’t it a science class? Why are we moving like in PE class?”“Including the counting of the stairs, we may need to go up and down 4 floors THREE times in total. Whining, running stairs is the last thing we want to do!!!


               

              实验第三步,哀鸣第三级: 计算分析实验数据,拓展应用问题。

              Step Three, Whine Three: Analyze the Experiment Result and Work on Extended Questions.

                    兴奋地完成了实验后,实验报告单上还有很多的计算和分析问题需要回答。不仅要画出力的作用图,还要计算和比较小组成员间哪个是大力士。但是最最让人大跌眼镜的是这几道应用问题:

              While completing the calculation and analysis part in the experiment sheet, students were given two more questions in the bottom part of the paper: 

              1.   食物为身体带来能量。1卡路里等于4184焦耳的功。一个大份的麦当劳炸薯条约有400卡路里,估算有大约100根薯条,那跑一次四层楼高的楼梯所使用的功可以消耗多少根薯条的卡路里?

              Food brings energy to our body. Food energy is measured in Calories and 1 Calorie is equal to 4184 J. If a large order of fries from McDonalds is 400 Calories and about 100 fires. Calculate how many fries you need to eat to have enough energy to climb the stairs once. 

              经过一番计算,答案居然是~~半根!!!吃一根薯条居然要跑两次四层楼梯才能消耗掉?!

              The answer is HALF! One fry needs to run 8 floors to burn the energy. How are we going to face fries in the future?

              呜呜呜,今后我们还敢吃薯条吗?

              2.   麦当劳一份套餐里有一份大薯条,一个芝士汉堡,一个大可乐。吃完这一餐,你需要跑多少次(四层高的)楼梯?

              A meal at McDonalds has a large fries, cheeseburger(295 Cal) and a large cola (200Cal). How many times must you run up the stairs to use all the energy from this meal? 

              答案是~~ 300次。 呜呜呜,拜拜了,麦当劳,下辈子再见吧。

              The answer is 300 times. Whining, so long, McDonalds.

              提示:这是一种纯数学的等量计算。食物中大部分的能量其实被身体的器官和保暖功能消耗掉。

              Note the most energy we get from food is actually used for body functions and keeping warm.

              在这样的实验课上,学生们对物理概念的理解无法不深刻,对知识的应用和体验完全来自切身实践。“全情”参与、手脑结合、心领神会并顺便学点生活知识,这就是枫叶加方科学课堂的精髓。

              Such an experiment in class has left students with a strong impression. All-heart participation in a hands-on practice is how Maple Leaf’s science classes have students learning the knowledge and life sense.

               



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