Safety (seat) belts are used to prevent accident while driving . Why ?

Explanation

While travelling in a moving car, our body remains in motion in the direction of the motion of the car. When the breaks are applied 3 suddenly, our body tends to continue in motion due to Inertia. This may cause injury to us by Impact or collision with the panels in front. The seat belt exerts a force on our body to make the forward motion to slow down.