How can I push an AI character with my main player (vehicle)?

My main player is a vehicle, and the enemy is an AI character.

What’s happening now is whenever my vehicle player bumps into the enemy, it gets propelled backwards, away from the enemy, despite it being a thousand times heavier than the enemy. The vehicle is also bigger than the enemy, which makes it unrealistic visually for it to get bumped away by something smaller.

What is want is for the vehicle to push the enemy and make it slide in the direction that the vehicle is going when the vehicle collides with it.

I am wondering if there is something to do with AI characters colliding with vehicles that I am missing.

Just wanted to bump it up a bit. I would really appreciate it if someone could give me some tips, if not the solution itself.