You have been called in by your neighborhood safety council to advise them about

Question

You have been called in by your neighborhood safety council to advise them about installing a barrier on a dangerous curve that has been subject to several recent accidents. They need to decide between a new a "softer barrier", which consists of barrels of water, and the traditional concrete barrier. In a test, two 1400 kg cars initially travelling at 50 mph were crashed into each barrier. The softer barrier took 1.6 s to bring the car to a rest, while the traditional barrier took 0.1. You have been asked to prepare a report on the force exerted on the car in each case.

Explanation / Answer

v = 50 x 1609 m / 3600sec = 22.35 m/s

Impulse = change in momentyum = F x delta t

1400 x 22.35 - 0 = F x 1.6

F = 19553.82 N

............

1400 x 22.35 - 0 = F x 0.1

F = 312861.11 N

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.