Airplane flight recorders must be able to survive catastrophic crashes. Therefor

Question

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown at high speeds against a barrier. A 39-kg box is thrown at a speed of 360 m/s and is brought to a halt in a collision that lasts for a time of 6.0 ms. What is the magnitude of the average net force that acts on the box during the collision?

Explanation / Answer

mass of box(m)=39kg

initial velocity(u)=360m/s

final velocity(v)=0

time of impact during collision(t)=6x10^-3sec

force exerted on the box to stop it is

F=m(v-u)/t

=(39(0-360))/(6x10^-3)

=-2340000N

F =-2.34x10^-6N here -ve indicates opposite to motion of box

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

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