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Minor Versionm

by Procheta Mallik


Using a cylinder and a couple of straws as "feet", one can make a model that seems to "walk" down as the cylinder rolls down a slope!

    • Exercise caution when handling the Paper cutter and Scissor

    • Keep glue off your skin

    • Don’t poke yourself with sharp ends of the paper clip

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  1. Draw two circles of radius larger than the supporting axle on the cardboard sheet
    • Draw two circles of radius larger than the supporting axle on the cardboard sheet

    • Carefully cut out the Circles using paper cutter/Scissor to make your wheels!

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    • Pull one arm of paper clips upright ( Now the arm should be perpendicular to the paper clip)

    • Off from the centre, Insert the arm into the wheels and secure the paper clip firmly on the other side with cellophane/insulation tape

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    • Stick the wheels to the supporting axle body using glue so that the pins stick out

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    • Flatten the end of the straw and make a ‘V’ cut at about 3 cm from the end.

    • Cut small shoe like profile using thin cardboard sheet

    • Bend the straw at the point where you made the cut

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    • Stick the ‘shoes’ onto the bent portion of the straw

    • Now, the whole straw should look like legs

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    • Insert the Straw legs onto the pins

    • Secure the legs by bending the pins.

    • Now you have your walking cylinder.

    Vishal: The first photo should have had a straight pin instead of bent.

    Procheta Mallik - Reply

    • Roll the walking cylinder on a slightly slant surface to see it in action.

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    • Roll the Walking Cylinder from the 2 m slant surface, measure the time with stopwatch and calculate the speed.

    • Record the time taken by the cylinder in first half of the slope and the second half of the slope separately (Two different trials are fine for measuring the time taken!) and calculate their respective speeds. Which half is faster? Why?

    Vishal: none of the 2 observations are feasible. Replace them with something more doable by children. It is hard to get 2m slope and also to measure time at small intervals.

    Procheta Mallik - Reply

    • Wheel's diameter is smaller than the body

    • The length of the Straw legs is too long that visualization experience is not good

    • Resistance due to irregular profile on cardboard wheels

    • Paper clips are not firmly taped to the cardboard

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Finish Line

Kailash NR

Member since: 05/02/2017

2,989 Reputation

71 Guides authored


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