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1.4

Minor Versionm

by Procheta Mallik

Introduction

Using ice-cream sticks and some rubber bands, we create a catapult (trebuchet) of sorts to model possible defences of a Fort.

Video Overview

  1. Take 10 ice cream sticks and stack them on top of one another. Using rubber bands, secure the ends of the stack of ice cream sticks as shown in the figure.
    • Take 10 ice cream sticks and stack them on top of one another.

    • Using rubber bands, secure the ends of the stack of ice cream sticks as shown in the figure.

  2. Take two more ice cream sticks  and stack them together. Now, secure the pair of sticks at one end  with a rubber band.
    • Take two more ice cream sticks and stack them together.

    • Now, secure the pair of sticks at one end with a rubber band.

    • Glue a bottle cap, face upwards, to one of the ice cream sticks at the free end.

  3. Pull the two ice cream sticks apart and place the 10 sticks' pile in between them.  You may glue the joined ends.
    • Pull the two ice cream sticks apart and place the 10 sticks' pile in between them. You may glue the joined ends.

  4. Place a nut (or any other weight/payload) in the bottle cap. Pull the bottle cap down while holding the other end of the 2-stick arm and release the stick to launch the payload. This now works as a Catapult.
    • Place a nut (or any other weight/payload) in the bottle cap.

    • Pull the bottle cap down while holding the other end of the 2-stick arm and release the stick to launch the payload.

    • This now works as a Catapult.

    • See how far you can launch various payloads, based on their weight, or how much you bend the stick backwards.

    • You may also alter the size of the 10-stick stack (remove sticks or add more sticks) to see if that makes any difference to the launch distance

    • Make sure the ice cream sticks are stacked uniformly and wound together.

    • The weight should be small enough to fit inside the bottle cap.

    • The rubber bands should be tight

Finish Line

Suhail Ahanger

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