anonymous
  • anonymous
According to safety standard for air bags, the maximum acceleration during a car crash should not exceed 60 g and should last for no more than 36 ms}. such a case, what force does the air bag exert on a 95.0 kg person? Start with a free-body diagram
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
\[F = m \cdot a\]Note that\[1 g = 9.81 {m \over s^2}\]
anonymous
  • anonymous
g is gravity
anonymous
  • anonymous
Indeed. But we can use gee's as a measure of relative acceleration, like here. 60 g of acceleration means the object is acceleration 60 times the acceleration of gravity.

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anonymous
  • anonymous
oh
anonymous
  • anonymous
can u please show me what the free body diagram would look lilke
anonymous
  • anonymous
So the Force is\[F = m \cdot 60 \cdot g\]where \(g=9.81\)
anonymous
  • anonymous
I think you can figure that out. What forces act on the body?
anonymous
  • anonymous
i mean |dw:1332730752286:dw|
anonymous
  • anonymous
Sure. If the occupant is sitting in a seat in the car. Think about sitting in a car. Where is the air bag located? If you were involved in a head on collision, which direction would you be moving? Which direction must the air bag force act such that it stops you?
anonymous
  • anonymous
so is this fbd suffiecient enough with amount of info i was given
anonymous
  • anonymous
No. We are talking about the force an air bag exerts, where is your force of airbag in that diagram? Also a FBD ALWAYS has a coordinate system.
anonymous
  • anonymous
|dw:1332730989861:dw|
anonymous
  • anonymous
Remove one of those F's. Remember this system is definitely moving and there is definitely an acceleration. Therefore, we must have an imbalance of forces.
anonymous
  • anonymous
When we experience a front end collision, there is no force that propels us forward, it is the simple fact that because we are a body of some mass in motion, an external force must act on us to slow us down (newton's first law). This force is the seat belt and the air bag.
anonymous
  • anonymous
|dw:1332731428906:dw|
anonymous
  • anonymous
That's it!

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