A person's life was saved in a car accident due to airbags system. During that car accident, airbags expanded in front of head of that person. If that car was not equipped with airbags then movement of head would be stopped by windshield in much faster time. Airbags saved life because it:
Correct answer: C. Causes much smaller force for longer time
- A. Causes much greater force for longer time
- B. Causes much greater force for smaller time
- C. Causes much smaller force for longer time
- D. Causes much smaller force for smaller time
Explanation
Airbags increase the time it takes for the head to stop, reducing the force of impact. Force is inversely proportional to time (F = Δp/Δt).
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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