Newtonův kyvadlový míček balanční míč rotující neustálý pohyb fyzikální věda kyvadlo hračka fyzika sklenice řemesla domácí dekorace

Electroplating style: Modern Art Battery: Powered by 4 batteries (product does not include batteries) Material: Plastic packing list: 1x Newton pendulum ball (product shipped without batteries) Features: 1. 100% brand new and high-quality 2. It can be placed on a table or shelf, giving you a good view of your home or office. 3. After installing 4 batteries, gently move them and the batteries will continue to shake. Whether at home, in the living room, in the study, or at the office desk, it is a beautiful scenery and creative decorative design. Not only did it demonstrate the pendulum, but it also demonstrated the laws of conservation of momentum and energy. It is a special gift for Christmas, birthdays, Children's Day, Thanksgiving, and other holidays. Notes: 1. Due to manual measurement, please allow for an error of 1-2cm. Thanks for your understanding. 2. Due to differences in lighting and screen settings, the color of the project may slightly differ from the image.