Who works with V-Ray version lower than 3.1, pay attention to materials section BRDF (Microfaset GTR (GGX)), if your version is older than 3.1 - this section will be empty, and you have to choose: Blinn, Ward or Phong , d dependence on material

Name: Newton_Cradle
Dimensions: 263x200x245 mm

NumVerts: 18752
NumPolys: 18522
NumFaces: 32252


Render Engines:
- VRay_RT
- MentalRay

Files Version:
- Max_v2012 (vRay + MentalRay)
- FBX_v2009 (vRay + MentalRay)
- OBJ

What is a Newton cradle and how does it work?
The Newton's cradle is a device that demonstrates the conservation of momentum and the conservation of energy with swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last sphere upward. The last sphere swings back and strikes the nearly stationary spheres, repeating the effect in the opposite direction. The device is named after 17th-century English scientist Sir Isaac Newton. It is also known as Newton's pendulum, Newton's balls, Newton's rocker.
https://www.youtube.com/watch?v=0LnbyjOyEQ8