Question

Why it is advisable to wear seat belt?

Answer 1

A seat belt has a hold on the person reducing the inertia. During a sudden break, the upper part of our body tends to continue in the state of motion (inertia of motion) and the seat belt slows the process hence preventing accidents.

Answer 2

It is advisable to wear the seat belt because if any how, a sudden break is applied, the upper body of the person doesn't hit the front part of the vehicle as if a sudden break is applied then the person still takes time to come at rest and thus he is still in motion. So just to reduce the motion of the person ( or inertia ), seat belts are preffered so that the person doesn't hits himself and is thus saved from an accident.