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The ABS system helped the driver to avoid collision by stopping the car's tires from skidding.
The ABS system stops the tires from skidding as you slow, which helps your car stop faster and gives you greater control of your vehicle while you're doing it. The ABS system does this by monitoring decelerations in the wheel. If ABS system senses a sudden deceleration of the car, it knows that the wheel is about to lock up.
Elastic collisions are the collisions in which both momentum and kinetic energy are conserved. The total system kinetic energy before the collision and after the collision is equals to the total kinetic energy of the system. If total kinetic energy is not conserved, then the collision is said to be an inelastic collision.
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