Description: The lever is divided into the leverage and the labor-saving lever, and the lever principle is also called the "lever balance condition." In order to balance the lever, the two torque moment acting on the lever (the product of the force and the arm) must be the same size. Namely: power × power arm = resistance × resistance arm Experimental Report: When using the lever, in order to save effort, you should use the power arm longer than the resistance arm; if you want to save the distance, you should use power arm shorter than the resistance arm. Therefore, the use of lever can be labor-saving, you can also save the distance. However, in order to save energy, you have to move more distances; you have to work harder to move less distances. It is impossible to achieve the goal of working with less effort and less distance For primary and secondary school students handmade crafts and a small invention of a good creative model. For children kids hand eye cooperation, intelligence development, hands and brain ability, learning more about science technology and Lever mechanics. Also students educational toys and birthday/Chrismas gifts Color: random Material: plastic Specification: Steps: 1. Install the rebound 2. Stuck the base 3. Stuck activity column 4. Install the column Accessories: Shot Frame Deck Small Ball Backboard Pole Base Rope Size Chart: 19x8x19cm/7.48x3.15x7.48inch Package Includes: 1 Set DIY Lever Shooting Machine Toys Note: Chocking Hazard - Small parts. Not for children under 3 years
