Qt Quick 3D Physics - Mass Example

 // Copyright (C) 2022 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 import QtQuick
 import QtQuick3D
 import QtQuick3D.Physics

 DynamicRigidBody {
     property bool inArea: false
     property real sphereDiameter: 2
     density: 2

     Model {
         source: "#Sphere"
         scale: Qt.vector3d(sphereDiameter, sphereDiameter, sphereDiameter).times(0.01)
         materials: PrincipledMaterial {
             baseColor: "yellow"
         }
     }

     physicsMaterial: PhysicsMaterial {
         restitution: 0.6
         dynamicFriction: 0.5
         staticFriction: 0.5
     }

     collisionShapes: SphereShape {
         diameter: sphereDiameter
     }

     massMode: DynamicRigidBody.Density
 }