Help with a 2d game and trajectory projection

hello. i'm working on a 2D game like angry birds, and i'm looking to have a projection with an arrow for the direction of the ball and the power,( for a full power the arrow will be extended. i'm using the Rigidbody2d for all the physics stuff and i'm shooting the ball with AddForce() to a specified direction calculated this way

             Vector3 direction = 
                         Quaternion.AngleAxis( 
                                     _degree,Vector3.forward) 
                                                         * Vector3.right;
             
             GetParams().GetRigidbody2D().AddForce( 
                                             direction 
                                                     *(int)( (int)_power * POWER_MULTIPLIER )
                                             );       

so i have to plot my arrow from the origin point to the direction and based on power i have to set up the lenght of the arrow... any help?