Question

How can seat belts helps us ??

Answer 1

In a running car , our speed is equal to the speed of the car. Since our lower part of our body is respect to the car, when the car applies brakes, the lower part of our body also comes to rest while the upper part of our body is at motion due to inertia of motion. Hence we fall in the forward direction. This may cause injury. Seat belts are worn to prevent such accidents. They exert a force on our body to make the forward direction slower