want to knock gameobject to the same direction as the projectile

Hello im very new to unity I want to knock the gameobject to the same direction as the projectile but unfortunately i was able to knock it horizontally and vertically. im unable to knock it at angle and also this is a 2d game.

any help is much appreciated!

they do something similar to to what you’re asking in this video, about half-way.
they shoot a bear with a capsule collider, and apply force where the “projectile” hit, and send the bear flying in that direction.

http://unity3d.com/learn/tutorials/modules/beginner/live-training-archive/fun-with-lasers