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2.3

Minor Versionm

by Vishal Bhatt

Introduction

A lever is a simple machine, which helps us lift a load. Levers are classified into three different classes depending on the position of the load, effort, and fulcrum. In this TACtivity, we will make the three classes of the levers to understand their working and identify the position of load, fulcrum, and effort.

Video Overview

    • Handle Scissors with care.

  1. Take a bottle cap and glue its flat side to one end of an ice cream stick. Make a mark 6 cm from one end of a fat straw, using a ruler, and cut the straw at this mark. Glue the centre of the fat straw to the centre of the ice cream stick perpendicularly, as shown.
    • Take a bottle cap and glue its flat side to one end of an ice cream stick.

    • Make a mark 6 cm from one end of a fat straw, using a ruler, and cut the straw at this mark.

    • Glue the centre of the fat straw to the centre of the ice cream stick perpendicularly, as shown.

  2. Now we have two sides: one side that has the bottle cap and the other side being the free end of the ice cream stick. Take a small nut and place it inside the bottle cap. This is the "load". By tapping on the free end of the ice cream stick, the load gets ejected from the bottle cap.
    • Now we have two sides: one side that has the bottle cap and the other side being the free end of the ice cream stick.

    • Take a small nut and place it inside the bottle cap. This is the "load".

    • By tapping on the free end of the ice cream stick, the load gets ejected from the bottle cap.

  3. Take three ice cream sticks; make marks 2 cm from both ends of all the three ice cream sticks. Place the three ice cream sticks together on top of each other, so that the markings coincide with each other, as shown. Secure them with a rubber band on the marking at one of the ends.
    • Take three ice cream sticks; make marks 2 cm from both ends of all the three ice cream sticks.

    • Place the three ice cream sticks together on top of each other, so that the markings coincide with each other, as shown. Secure them with a rubber band on the marking at one of the ends.

  4. Move the free end of the middle ice cream stick slightly apart and then wind a rubber band on the marking of the two ice cream sticks that are together. At the end where all three ice cream sticks are together, wind another rubber band perpendicular to the other rubber band and between the sticks, as shown in the figure.
    • Move the free end of the middle ice cream stick slightly apart and then wind a rubber band on the marking of the two ice cream sticks that are together.

    • At the end where all three ice cream sticks are together, wind another rubber band perpendicular to the other rubber band and between the sticks, as shown in the figure.

  5. Keep a thermocol ball in between the two ice cream sticks and try to break the thermocol ball by bringing the ice cream sticks together. Keep a thermocol ball in between the two ice cream sticks and try to break the thermocol ball by bringing the ice cream sticks together.
    • Keep a thermocol ball in between the two ice cream sticks and try to break the thermocol ball by bringing the ice cream sticks together.

  6. Take two ice cream sticks, mark 1 cm from one end of both the ice cream sticks. Wind a small rubber band on the marked end of each ice cream stick. Now, wind both the ice cream sticks together using a small rubber band, just behind the marked ends.
    • Take two ice cream sticks, mark 1 cm from one end of both the ice cream sticks.

    • Wind a small rubber band on the marked end of each ice cream stick.

    • Now, wind both the ice cream sticks together using a small rubber band, just behind the marked ends.

  7. You may pick up light objects, like a plastic bead, by pressing the sticks between the rubber band and the free end. You may pick up light objects, like a plastic bead, by pressing the sticks between the rubber band and the free end.
    • You may pick up light objects, like a plastic bead, by pressing the sticks between the rubber band and the free end.

    • Catapult - Varying ejections of the nut - Make sure to place the nut correctly at the centre of the bottle cap.

    • Nut Cracker - Thermocol balls are not being cut - Make sure the ball is placed properly and the ice cream sticks are straight.

    • Tongs - Unable to get a grip while picking the beads - Make sure the rubber bands are tightly secured and are at the correct position.

Finish Line

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