title: How to add physics to an object in Unity 5
body: <p>I'm having a problem with Physics! I have imported an object which a bridge from 3ds max to unity 5 ,but the problem is that whenever I want to walk through on it ,I just fall down. It's like there's nothing called BRIDGE! I know there must be a problem about Physics. But how to fix it ?! </p>
  
  <p><a href="https://i.stack.imgur.com/1B7KP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1B7KP.png" alt="enter image description here"></a></p>