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by Vishal Bhatt

Introduction

Insert ring magnets in a stiff straw such that every alternate pair of magnets is repelling the previous pair. Place a frog at the top and enjoy it's jumping as you push the magnets downwards.

    • Sharp edges of the scissor may lead to cuts, if used on body parts. Exercise caution while using it.

  1. Draw Frog on a sheet of paper and colour it . Paste the paper on a card sheet and cut out the frog using scissor . Roll a tape or piece of paper to form a cylinder with a diameter bigger than the stiff plastic straw.
    • Draw Frog on a sheet of paper and colour it .

    • Paste the paper on a card sheet and cut out the frog using scissor .

    • Roll a tape or piece of paper to form a cylinder with a diameter bigger than the stiff plastic straw.

    • You may use another plastic straw instead of tape/paper. The straw needs to have a bigger diameter than the stiff straw.

  2. Take 4 x 4 cm  of foam and make a hole at the center using scissor . Insert a stiff straw in the hole made at center of the foam . Insert two ring magnets in the straw.  Place the magnets such that they attract each other.
    • Take 4 x 4 cm of foam and make a hole at the center using scissor .

    • Insert a stiff straw in the hole made at center of the foam .

    • Insert two ring magnets in the straw. Place the magnets such that they attract each other.

  3. Now take another pair of ring magnets and insert in the straw such  that these two magnets repel the two which are already in. Repeat the above step with two more pairs of magnets. Push the frog and the magnets downwards and release to see the frog bounce back.
    • Now take another pair of ring magnets and insert in the straw such that these two magnets repel the two which are already in.

    • Repeat the above step with two more pairs of magnets.

    • Push the frog and the magnets downwards and release to see the frog bounce back.

    • A glimpse of the jumping frog .

    • The pair of magnets need to repel each other for the bouncing to happen.

    • Straw should be firm.

    • If the hole in the foam is bigger than the straw, the straw may not stand straight.

    • Measure and record the distance between magnet pair 1, 2, 3, 4.

    • Push magnet pair number 2 and observe the height the frog jumps to. Now push pair number 3 and compare the height. Compare with pair number 4.

    • Repeat the experiment with single magnet instead of a pair. Compare the behaviour.

    • Add two more pairs and compare the behaviour with 4 pairs.

Finish Line

Vishal Bhatt

Member since: 04/26/2017

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