question_answer

A bullet fired from a gun is more dangerous than an air molecule hitting a person, through both bullet and air molecule have same velocity. Give reason.  

Answer:

Since, mass of bullet is very large in comparison to air molecule, so momentum of bullet is very large than that of air molecule. When bullet and air molecule hit a person, the momentum transferred to person by bullet is larger than the momentum transferred by air molecule. Thus, by bullet large force is exerted on the person.                                     (3)