CARPENTER SAWING WOOD | English
Channel: Arvind Gupta
Date: 2016-06-26

This is a dynamic model. As you crank the handle you can see a Carpenter working hard moving his saw to cut a piece of wood. To make this model you will need a plastic bottle, a wire crank, coffee stirrer, refills and pins. First cut a 250-ml bottle in half and make holes on the lid and bottle as shown. Then bend wire to make the crank. The crank converts rotary motion into linear motion. Take a plastic coffee stirrer and make notches all along its long edge to make SAW teeth for cutting. As you rub a stick on the notching they make a sawing noise. Make holes on both ends of the SAW. Place one hole of the saw in the crank. Now insert the crank and the SAW inside the bottle holes. The other end of the SAW must come out of the bottle lid. On rotating the crank the SAW will move up-down. Now make a CARPENTER using wire and sleeves. The figure is flexible and can easily bend. Notice two small loops on the feet and holes in the hand sleeves. Stand the Carpenter by fixing its legs with pins on the bottle lid. Then attach the SAW to the Carpenter’s hands with a pin with stoppers on both ends. Now the model is ready. On rotating the crank the SAW will go up-down. Place a piece of wood near the SAW teeth. It will appear that the hard working carpenter is merrily sawing a log of wood. 

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