According to Eq. 7-4, the longer the impact time of an impulse, the smaller the force can be for the same momentum change, and hence the smaller the deformation of the object on which the force acts. On this basis, explain the value of air bags, which are intended to inflate during an automobile collision and reduce the possibility of fracture or death.

(We have written F instead of for the net force, which we assume is entirely due to the brief but large average force that acts during the collision.) This equation applies to each of the two objects in a collision. We multiply both sides of this equation by the time interval . and obtain

Solution 6Q:

We have to explain the working of airbags in automobile on the basis of equation 7-4.

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Concept:

For the same change in momentum of the body, smaller the value of time interval (impact time) in which this change of momentum of the body takes place, larger would be the value of the net force acting during collision and vice-versa.