how do i add a force towards a position with a rigidbody2D?

how do I add a force towards a position with a rigidbody2D like when you shoot a bazooka then you get a bit of a knockback how do I do that

assuming you do something like

shell.AddForce(transform.forward * thrust);  

to shoot the bazooka shell, use

shooter.AddForce( -transform.forward * thrust/10);  

to apply a knockback force to the shooter. A little less force in the opposite direction.