Version: 2017.2
public float mass ;


The mass of the rigidbody.

Different Rigidbodies with large differences in mass can make the physics simulation unstable.

Higher mass objects push lower mass objects more when colliding. Think of a big truck, hitting a small car.

A common mistake is to assume that heavy objects fall faster than light ones. This is not true as the speed is dependent on gravity and drag.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float mass; public Rigidbody rb; void Start() { rb = GetComponent<Rigidbody>(); rb.mass = mass; } }