Metal Newton Pendulum Ball Office Teaching Newton Inertial Pool Ball

The set of balance balls is particularly suitable for the place such as office, desk table,computer table etc.
Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy.
Friction and damping effects are also observed.
Pull up one ball and release,only one ball in the other side moves,pull up two,two balls will react, and so on.
When you are sleepless,just move your eyes with the bump of the ball,then you may slowly,slowly falling asleep.
Features:

Name: Desktop Decoration
Material: ABS plastic metal
Weight: 600g
Dimensions: 29.0 cmx17.0 cmx 19.5 cm
Estimated delivery time：About 10 business days.We will use standard shipment for the orders. Normally it may need about 10 days, but sometimes please note: Delivery times are as provided by our carriers and are estimates only. Delays may occur during peak periods, and due to factors outside the carriers control.