title: Imported .fbx model is falling down when used as prefab in Unity 3D
body: <p><img src="https://i.stack.imgur.com/j6q6F.png" alt="Inspector of the falling object"></p>
  
  <p>I have made a model in the 3ds max and exported as .fbx file. Same model I have imported in Unity 3D and use it as Prefab. Model created in Unity 'eg:- GameObject -> Create Object -> Cube' is not falling down in(-y axis).</p>
  
  <p>But the imported .fbx object as Prefab falls down as game is started (like object with physics component).</p>
  
  <p>I have NOT added RigidBody to the object.</p>
  
  <p>I want my imported object should behave like one created in Unity3d.</p>
  
  <p>Do anyone know how I should prevent prefabs with imported objects to stuck at one place.(do not fall in - Y axis)</p>
  
  <p>Thanks</p>