How do I add force to the current force of the rigidbody?

Hey guys, I'm making a game where players can pick up other players and then throw them in the direction where they are looking. The problem is that I don't want to reset the thrown players x velocity because then they will just awkwardly stop in mid-air. How can I make the thrown player be affected by both the direction he is thrown in and his own movement input? Right now this is the code I'm using for moving the player:`rb.velocity += new Vector2(horizontal speed, rb.velocity.y);` and this is the code I'm using for adding velocity when the player is thrown: rb.AddForce(throwDir, ForceMode2D.Impulse); The throwDir is just transform.right speed.