Your car is at its most stable while maintaining a consistent speed and in a straight line. Your car become less stable when you brake because much of its weight shifts to the front. This increases grip at the front of the vehicle, while reducing it at the rear. The opposite occurs when you accelerate, the front becomes lighter while the rear becomes heavier.
Now let’s look at making a turn and how this increases instability. Just before you come to a turn, your car has already gained momentum. As you begin to turn the wheels, your car still wants to go in a straight line. This can be felt in the form of inertia. If you’re making a right turn, it feels as though your body is being pushed to the left, while in fact it’s actually continuing in a straight line.