Cheers with inertia! Let's enjoy with the law of inertia!
The law of inertia has some parts that students don't understand when explained in words, but it can be easily understood by looking at experiments. Introducing a fun experiment. However, some students have too much fun and forget the essential law of inertia ...
Experiment 1: Cheers with inertia!
For stationary objects
First of all, it is an orthodox tablecloth pull. The point is not to be afraid to pull the cross down as much as you can. It will remain the same even if the bottle is turned upside down.
Pull out the bill sandwiched between the mouthpieces of the bottle. Grab the bill with your left hand and tap it down with your right index finger. It's very easy. It's important not just to show it, but to say it before you do it. It's a fuss when you say, "I'll give you this money if you get the bill without knocking down the bottle." If the students knew how to do it ...
Next is the Daruma doll drop. I think I've done it once. The right way is to swing the hammer. Please shake it as much as you can.
運動している物体の場合
Next is the case of a moving object. Please use UFO sesame for this. It's a little difficult to adjust, but you'll soon get used to it. A company called Hasegawa Rika sells cheaply. It is about 1500 yen including shipping. As of 2021
When inertia works and when it does not work: Attach a thin thread to the coin up and down. If you pull the lower thread suddenly, the inertia of the coin will work, the lower thread will break and the coin will stay in place. If you pull it slowly, the upper thread will break without inertia. Isn't it fun for the teacher to take some and let the students expect and cut the other side?
