the reason an engine "jerks" is because all of the fuel going into the cylinders are is not completely burning thus causing a loss of power...
Could be just in need of a tune up.
Obviously there is a reason. Consult a medical practitioner.
Because people want jerks to people for no reason because they are mean,rude and have no lives!
That's your clutch
If the automatic transmission car jerks when accelerating and the dash does not indicate a gear, there is a problem with the transmission. Check the shift solenoid.
the fuel filter or carburetor might be plugged, really need to know when it jerks be it accelerating or stopping.
You have a serious front end problem. Have a mechanic inspect it asap.
It would depend on what you mean by 'jerks.' It could be a fuel issue, tire alignment, ect. If it's really bad, it's probably best to take it in.
Could be in need of a tune up. If the "check engine" light is or has illuminated, have it scanned for codes first. The codes will help lead you to the problem.
Loose nut behind the wheel. Loose nut behind the wheel.
Have your brake system inspected. Sounds like you have a caliber sticking.