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Product Name: KX2126 Weighing Scale
Model Number: KX2 216 Rod Scale
Size: Approximately 300 mm in length, 113 mm in width, and 15 mm in height
Weight: Approximately 25g
Material: Wooden
Color: Mixed Color
Does it use a battery: No
Packaging: 500 pcs
Box dimensions: 600*450*550mm

Preface:

In today’s era where more and more emphasis is placed on children’s education, scientific enlightenment education has gradually become an important topic in the field of education. More and more teachers and parents are focusing on developing children’s scientific literacy from an early age, enabling them to establish good character and behavioral habits from the beginning. Parent-child interactive crafts can improve the quality of parent-child time together, enhance parent-child relationships. The moments we spend with our children are free from phones, iPads, or televisions—only joy, interaction, and communication. It helps children develop the ability to solve problems on their own. When faced with challenges, children must first see, experience, and resolve them themselves, just as parents and teachers do during craft activities. It also stimulates children’s imagination—in their world, cars can fly in the sky, and the sun can be green... Playing DIY crafts allows children to develop hands-on skills by using various tools, giving their hands ample opportunity to move. Pencils, paints, scissors, hot melt glue, tape—they all challenge children to try, and to some extent, help develop different skills. It boosts children’s confidence. During craft activities, we explore countless possibilities and experience many failures, but we always succeed, which in turn enhances their confidence. It helps cultivate children’s focus. As they explore various tools and crafts, they remain very focused; without external distractions, they can continue exploring indefinitely.

Experiment Objective: Through game-based entertainment, children can learn more about scientific knowledge and their hands-on skills. They will understand the principle of levers.

Principle application: A simple scale that utilizes the lever principle to measure mass, specifically referring to torque balance. The rod scale is divided into two sections at various connections on the hand, and the fulcrum can be considered as the support point of the lever. Thus, when the two ends of the rod scale are balanced, the torque exerted by the weight on the rod and the torque exerted by the object on the plate are equal. Torque = force × distance of action. Since the weight of the fulcrum on the rod is known, the distances of force application at both ends (the vertical distances from the fulcrum to the fulcrum point and from the object to the fulcrum point) can be visually determined.

Experimental Cognition: Under the combined effect of force and resistance, a lever is in equilibrium when force × lever arm = resistance × resistance arm. In our daily lives, the principle of lever balance is applied in many places, such as trash cans and nail clippers. Throughout history, examples of people using the lever principle are abundant.

Knowledge Expansion: A certain scale can measure objects up to 5 kilograms. Is it possible to make minor modifications to the scale to increase its range? According to the balance condition of the lever, by changing the position of the support points (i.e., adding a lifting rope near the hook), new scales can be marked using the same method. Most scales have two lifting handles and two sets of markings, which significantly increases their weighing capacity.

Knowledge Extension: Kids can create a simple weighing scale by themselves. Look for materials in daily life, such as replacing the weight with a larger one, etc.

Safety Warning:

All components within this product are specialized equipment for student experiments. Please use it under the supervision and guidance of teachers and parents to ensure safety! All products are prohibited from being eaten. They are not suitable for children under three years of age. Do not bring them close to sources of fire. If using batteries, check that the circuit is unobstructed and all components on the circuit are intact, and that all contacts are properly made. On the battery, + indicates the positive electrode and - indicates the negative electrode. During assembly, be careful not to get glue on your eyes or skin.