This is a fun experiment using coins and a paper strip. Place a paper strip on the lid of a bottle filled with water. Then place a coin on the strip. Then hit the free end of the strip hard with your finger. The strip will fall but because of inertia the coin will remain on the bottle lid. Repeat the same experiment with a stack of coins instead of one. Again the strip will fall but the coins will remain on the lid. Now place the strip on two bottles with coins on their lids. On striking the strip in the middle the strip will fall but the coins will stay put on the lids.
Repeat the experiment with one coin standing on the strip instead of sitting flat. On striking the free end of the strip the coin stands the strip falls. Repeat the same experiment with two bottles and two coins standing vertically. Again on striking the strip falls and the coins keep standing vertically. This is a fun experiment to do with inertia. This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner
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