Quantity: 1 Piece
Product Material: frosted glass + fishing line + plastic base
Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy
Friction and damping effects are also observed
Includes steel balls, plastic frames and base
Easy and convenient to use.
Batteries: 4 x AA batteries(Not Included)
Glowing Newton ball swing more dazzling at night, the base has a luminous plate, projected onto the glass beads, glass beads showing colorful, very attractive.