Elastic & Inelastic Balls (Happy and Sad Balls). Pack of 10 Pairs.

Happy and Sad Balls are used to show the relationship between elastic and inelastic collisions. While both balls share an identical makeup between mass, density, and appearance, one will bounce, while the other will not. They are sold as a pack of 10 pairs. The Happy Ball consists of standard neoprene that has low hysteresis, low surface friction, and weak intermolecular forces. The Sad Ball consists of Norsorex that has high hysteresis, high surface friction, and stronger intermolecular forces.Interactive Demonstration: Includes two balls – one elastic ("happy") and one inelastic ("sad") – to illustrate energy transfer and material properties.Hands-On Learning: Engages students in understanding elasticity, as one ball bounces while the other does not.Durable Materials: Made from high-quality materials to ensure repeated use without wear.Perfect for Physics Lessons: Ideal for teaching concepts like kinetic energy, elasticity, and material science in a fun, memorable way.Compact and Portable: Lightweight and easy to store, making it convenient for classroom demonstrations or science fairs. PRODUCT WARNINGS WARNING: This product can expose you to chemicals including benzene and lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov. This product contains latex, which can cause allergic reactions in some people. If symptoms of an allergic reaction occur, stop use immediately and consult a physician. This product consists of small balls, making it a choking hazard. Only use with adult supervision. Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.

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