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by Vindhya Rai

Introduction

Friction is caused when two objects rub against each other. In this TACtivity, we will make a simple toy using cotton threads, cardboard sheet, ice cream stick and beads, which can climb up and help us understand the concept of friction.

Video Overview

    • Be careful while using scissors and paper cutter.

  1. Take two cut pieces of cardboard each of dimension  5cm x 5cm. Draw a straight line in the middle of one of the cardboard pieces. Draw a slanted line, at an angle of 45° with respect to the middle line.
    • Take two cut pieces of cardboard each of dimension 5cm x 5cm.

    • Draw a straight line in the middle of one of the cardboard pieces.

    • Draw a slanted line, at an angle of 45° with respect to the middle line.

    • You can use any protractor to mark the angle.

  2. Draw another slanted line with the same angle, on the other side of the middle line. Cut two pieces of straw  of length 3 cm each. Apply glue along the slanted lines and stick the straw pieces on them.
    • Draw another slanted line with the same angle, on the other side of the middle line.

    • Cut two pieces of straw of length 3 cm each.

    • Apply glue along the slanted lines and stick the straw pieces on them.

  3. Stick the other cardboard piece (prepared in step 1) on the straw pieces. Don't press the straws while sticking the cardboard, as it may block the straws. Draw a sketch of butterfly on another sheet of paper or cardboard and cutout the sketch.
    • Stick the other cardboard piece (prepared in step 1) on the straw pieces.

    • Don't press the straws while sticking the cardboard, as it may block the straws.

    • Draw a sketch of butterfly on another sheet of paper or cardboard and cutout the sketch.

    • Stick the butterfly on the cardboard and straw setup, that you have prepared.

    • Also, you can just draw a sketch of the butterfly on the cardboard piece.

  4. Take two pieces of cotton threads of length 1 m each and insert them, separately, through the two straw pieces. Tie the beads to one end of each thread, choose the end of the threads which  are coming out of the straws near the wings. If beads are not available, you can use any other object whose size is more than the diameter of the straw or make 5-6 knots on the end of each thread. This will ensure that the thread does not completely come out from the other end of the straw.
    • Take two pieces of cotton threads of length 1 m each and insert them, separately, through the two straw pieces.

    • Tie the beads to one end of each thread, choose the end of the threads which are coming out of the straws near the wings.

    • If beads are not available, you can use any other object whose size is more than the diameter of the straw or make 5-6 knots on the end of each thread. This will ensure that the thread does not completely come out from the other end of the straw.

  5. Make v-shaped notches near the ends (1 cm away from both the ends) as well as at the middle of ice cream stick. Tie the two threads at the two ends of the ice cream stick. If you find it difficult to make notches, you can use the insulation tape to secure the thread to the ice cream stick.
    • Make v-shaped notches near the ends (1 cm away from both the ends) as well as at the middle of ice cream stick.

    • Tie the two threads at the two ends of the ice cream stick.

    • If you find it difficult to make notches, you can use the insulation tape to secure the thread to the ice cream stick.

  6. Attach another thread in the middle of the ice cream stick and make a loop. Attach another thread in the middle of the ice cream stick and make a loop. Attach another thread in the middle of the ice cream stick and make a loop.
    • Attach another thread in the middle of the ice cream stick and make a loop.

  7. Hang the toy using the loop made and pull each thread one by one. See the butterfly climbing up. Hang the toy using the loop made and pull each thread one by one. See the butterfly climbing up. Hang the toy using the loop made and pull each thread one by one. See the butterfly climbing up.
    • Hang the toy using the loop made and pull each thread one by one. See the butterfly climbing up.

    • Straws are moving inside cardboard while pulling the thread - Straws are not stuck correctly and firmly, apply enough glue and give some time to dry.

    • Not able to insert the thread - End of the straw piece is closed, as more pressure was applied while sticking the cardboard piece on it. Don't press the straw pieces or the cardboard too hard while sticking.

    • Butterfly is not climbing - The straws are not slanted enough to cause a friction between the thread and straw. Make sure that you maintain the angle between the straws while sticking the second cardboard piece (in step 3).

  8. Make more climber setups with different angles such as 0°, 15°  etc. Use nylon thread instead of cotton thread. Tie a water bottle to the climber setup. Add water to  the bottle  in small increments (2 ml) and try to  make it climb.
    • Make more climber setups with different angles such as 0°, 15° etc.

    • Use nylon thread instead of cotton thread.

    • Tie a water bottle to the climber setup. Add water to the bottle in small increments (2 ml) and try to make it climb.

    • Use 45° climber with nylon threads for the last (water bottle) variation.

Finish Line

Suhail Ahanger

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