Скачать или смотреть The Uphill Rolling Experiment That Breaks Physics

The Uphill Rolling Experiment That Breaks Physics
How to roll a funnel uphill (center of gravity)
Made for parents and teachers

Welcome back to Kids Fun Science! Today, Ken demonstrates a cool *do it yourself* experiment showing how to roll a funnel uphill using the `center of gravity`. This engaging `physics` demonstration is one of our favorite `science experiments` designed for `science for kids` to enjoy and learn from.

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Chapter
0:00 Kids Fun Science Intro
0:07 What you need
0:15 Set up
2:00 measurements of each side of the yard sticks
2:16 1st experiment
2:23 Science Behind It
3:33 2nd experiment
3:38 Tape roll downhill and funnel uphill
3:59 Fun Fact: They are both rolling down
4:18 3rd experiment
4:36 4th experiment

Set up
2 funnels glued or tape together.
3 books, one thiner book on the lower end and 2 thicker books on the high end
2 yard sticks (.91 m) or any 2 pieces of wood in a v-shape from thin book to thick book.
If you use yard stick tape to books.
Place funnels on lower end of thin book on top of the v-shape yard sticks and let go.
If it does not start rolling, then move it up a little and try again

Science Behind it
When the funnels are glued together, their center of gravity is directly between the two wide openings. When the funnels are placed on the yard sticks on the table, they begin to roll because their center of gravity is going down. As you can see the funnels go below the yard sticks. The yard sticks allow the center of gravity of the funnels to go down as the funnels travel up the yard sticks. The funnels’ shape causes an optical illusion as they appear to be rolling uphill, even though the center of gravity is actually rolling downhill. So it does fit all things roll down hill, even though it looks like its rolling up. Because of the shape of the funnels.

The keys to this experiment are the shape of the funnels, the v-shape position of the yard sticks (ruler), and the object’s center of gravity. You can see I have these yard sticks and one end is higher than the other side. How you ever heard of anything that can roll up hill. Well besides my “Gravity Hill experiment” Everything rolls down hill, except these 2 funnels. I place them on the low end of the yard sticks and they roll up hill to the high end.

The reason is the 2 yard sticks are very close to the center of the 2 funnels I have attacked together. So when the funnels start to roll they are rolling down hill because they are rolling down the funnel sides as the yard sticks get wider. So it does fit all things roll down hill, even though it looks like its rolling up. Because of the shape of the funnels.