A student\'s life was saved in an automobile accident because an airbag expanded

Question

A student's life was saved in an automobile accident because an airbag expanded in front of his head. If the car had not been equipment with an airbag the wind shield would have stopped the motion of his head in a much shorter time. Compared to the windshield the airbag causes a much smaller change in momentum exerts a much smaller impulse causes a much smaller change in kinetic energy exerts a much smaller force E does much more work An inelastic collision is one in which: A) momentum is not conserved but kinetic energy is conserved B) total mass is not conserved but momentum is conserved neither kinetic energy nor momentum is conserved momentum is conserved but kinetic energy is not conserved E) the total impulse is equal to the change in kinetic energy

Explanation / Answer

9.

in this case, exerts a much smaller force over a greater time (J = F*t, so force is inversely proportional to time)

option D is correct.

10. option D is correct, kinetic energy is not conserved in inelastic collision, only the momentum is conserved.

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