Answer :
The x -component of this vector is 0, because it's in the direction of travel.
The x -component of the tangential acceleration is the acceleration parallel to the road. This can be found by defining a vector from the point of interest to the origin, and then finding its magnitude.
When you're driving a car, your acceleration is always changing as you move around curves in the road. The x-component of this acceleration can't change because it depends on your speed. If you're going faster, then your x-component goes up; if you're going slower, it goes down.
The x-component of your acceleration is always constant: no matter how fast or slow you go around a curve, your acceleration will always be parallel to the road—and therefore, also constant at any point along a curve.
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