Is it safe to uproot a bush with my small car?

I have some large bushes in my backyard that need uprooted. Is it safe for me to use my Kia Sephia (which is not made for towing)? I actually did pull up a couple of the smaller ones, but I needed to use momentum (about 2-3 mph). Will this jerking ruin the frame of the car or other parts? Also, if it is okay, how about getting a running start to about 5-7 mph to pull out the bigger bushes?