Easy Spinner | English
Channel: Arvind Gupta
Date: 2016-06-08

Today we will make a Super Spinner using two straws and a bottle. Let’s see how it works. As you move the bottle up-down in water the spinner spins very fast. You will need a 2-litre plastic bottle and two straws plus some other small things. Take a 7-cm long thick straw and fold it in the middle. Nip the first one and then the other corner of the fold. On opening the straw you will see a Diamond shaped hole. Keep the hole right in front of you. Then flatten both the open ends of the straw and seal them with color tape. Then nip one corner on one side and the diametrically opposite corner on the other side. This way you will make two holes which will be diametrically apart. Air will escape from these holes and spin the straw. Press the short end of the bendable yellow straw and cut a “V” notch near its end. Then place a loose bead in the straw. Finally weave in the straw spinner. Pierce a paper pin in the yellow straw near the bead as a stopper. To prevent the spinner from falling glue a Styrofoam ball in the mouth of the yellow straw. Now the straw spinner is ready for testing. On blowing from the other end of the yellow straw the spinner will rotate at a fast speed. Now we will fix the yellow straw in a 2-litre bottle lid.
Make a small hole in the bottle lid with the help of a scissors. Cut the bottle base. Press fit the yellow straw tightly in the bottle lid. Apply some glue to seal the joint. There should be no air leakage from this joint. Now plunge the bottle in a bucket of water. Water will enter the bottle and air will be expelled from the yellow straw. This air will emerge from the two diametrically opposite holes and spin the straw very fast. This experiment also demonstrates Newton’s Third Law of Motion that every action has an equal and opposite reaction. 

This work is supported by IUCAA (www.iucaa.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Manish Jain, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org