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This is exactly how much water you have in a bottle of the 'water bottle flip' to do to succeed
Science & Planet ‘Water bottle flipping’, a waterbottle, rotating up to throw that perfect vertical landing, was in 2016 and 2017 hype. Today, diving on social media, new videos in which people share their successful roll show. But... how much water should you are now exactly in a bottle for the perfect water bottle flip’? Students of the University of Twente, you could watch the physics behind the ultimate roll.

Five first-year physics students presented with a high resolutievideocamera rolls stuck with a full bottle, a bottle filled with two tennis balls and a bottle, partly filled with water. Then, students delved into the physics behind the different throws, so in the scientific magazine ‘American Journal of Physics’ to read.

Read also New craze after 'water bottle flip': this is 'egg hopping'

A full waterbottle, after a spin perfectly on the bottom, of countries, is impossible. Who a bottle partially fill with water, it makes itself easier. The water spreads during the roll out within the bottle, so the rotational speed drops. The rotation speed is the lowest when the bottle is in a vertical position, with the bottom upwards or downwards. That way it is most likely that the bottle already standing on the bottom lands.

Then examined the students how much water is in a bottle, a must for a successful outcome. From the formula it appears that the optimum loading depends only on the ratio between the mass of an empty bottle and the mass of a fully-filled bottle. According to the researchers, is an optimal vulpercentage between 20 and 41 percent. For a bottle of Spa of a half litres is the optimum loading for example 30 percent, that means that you have 150 milliliters of water to add.

students have developed a movie in which everything is a step-by-step explanation:

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