Question
8. Suppose a car had shock absorbers behind its bumper when it impacted a tree.For the same impulse, this would produce __ in the amount of the impact force. (1 Point) [4 no change a decrease a increase
Solution
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Upton
Master ยท Tutor for 5 years
Answer
decrease.Impulse is equal to the change in momentum, and it's also equal to the average force multiplied by the time over which the force acts. If the shock absorbers increase the time of the impact (by allowing the bumper to crumple slowly rather than abruptly), then for the same impulse (same change in momentum), the average force must decrease.