How can I add a force that takes friction into account?

Hello! I’m trying to add the ability to slide in my game, though with the way I’ve made it the only way to get a boost is to add a force. Having a slide that doesn’t slow down at all is a bit unusual. Any help would be appreciated!

Have you tried applying a diminishing instant force to the object? Store the force value in a scene or object variable and tween that variable from max force to 0. Then have an event that checks if the tween is playing and if it is, applies an instant force using the variable as the force amount.