Have one object apply a force to another.

Trying to teach myself all this physics stuff in Unity. What with the RigidBody2D and the Colliders.

Though right now I am wanting to have one object, such as a platform, apply an upward force upon the player when the player touches it. (The player touches the platform, the player is then launched into the air.)

I assume Raycasting has something to do with it for detection so I do have raycasting. I imagine to accomplish this rigidbody2d.Addforce will be used.

Just for reference this is the code in my Player: https://dl.dropboxusercontent.com/u/3801241/Code/Player.cs

And this is what is in my Controller2D: https://dl.dropboxusercontent.com/u/3801241/Code/Controller2D.cs

I went through like a 9 episode tutorial on 2D movement and stuff. Absorbed what I could, I don't completely understand the code there but just trying to pick an idea and see if I can make something work hopefully I'll learn most of it along the way.