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Professional ApplicationExplain in terms of impulse how
Chapter 8, Problem 5(choose chapter or problem)
Explain in terms of impulse how padding reduces forces in a collision. State this in terms of a real example, such as the advantages of a carpeted vs. tile floor for a day care center.
Questions & Answers
QUESTION:
Explain in terms of impulse how padding reduces forces in a collision. State this in terms of a real example, such as the advantages of a carpeted vs. tile floor for a day care center.
ANSWER:Step 1 of 2
Change in momentum equals the average net external force multiplied by the time this force acts.
\(\Delta p=F_{\text {net }} \Delta t\)
The quantity \(F_{n e t} \Delta t\) is given the name impulse. Now, the force experienced can be greatly reduced if we can manage to increase \(\Delta t\) ie. we increase the time taken for the momentum change.
There are many ways in which an understanding of impulse can save lives. The dashboard padding in a car, and certainly the airbags, allows the net force on the occupants in the car to act over a much longer time when there is a sudden stop. The momentum change is the same for an occupant, whether an airbag is deployed or not, but the force (to bring the occupant to a stop) will be much less if it acts over a larger time. A longer collision time means the force on the car and the people inside will be less thus causing lesser fatigue.