Box2D force on object?

Hello, im wondering is there is a way for Unity's 2D physics engine to provide what forces are affecting a rigidbody2D each physics tick. What i especially want is to get access to how much weight is being pushed down onto an object with several objects stacked on top of it, for example as in a big pile with rigidbody2D objects (with varying shapes, masses and rotations).

If there is no way to read this from the physics engine, do anyone if there is an easy way to calculate this?