Rotate object to follow circular movement 2D

Hello there.

I have the following problem. I have a circle that can be dragged around using touch, and the circle has a "box" on it, that can rotate around the circle line. When i drag the circle harder however, i want the box to align itself with the direction that i dragged the circle towards.

I've attached a picture that describes my problem (excuse my drawing skills, no machine with Unity right now). State (1) is the beginning, and i drag the circle towards the State (2), the "box" on the circle must jump straight to the position and rotation that i drag towards, but only if i drag hard (a slower drag does not change the position or rotation of the box).

Any ideas on how i can do this? Thanks in advance!