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gmtarknoid
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Hi All,
This isn't a homework problem, but this forum seemed proper for this question. I'm a professional firefighter in California. We just learned this bailout technique and I'm curious as to the science behind why it works. Any insight would be greatly appreciated. Thanks!
-David Anderson
A FF (m=90kg) is forced to bail out of a window due to extreme heat conditions. He ties off his mass-less rappel rope to a 5kg chair. In order for this procedure to work, the chair cannot move at all while he is rappelling down it. What variables make this work? Is it simply just the friction on the rope? Also, is there a critical angle theta that will make the system catastrophically fail? In other words, if the rope is parallel to the building and perpendicular to the floor (firefighter simply hanging straight up and down), does that make any difference than say if theta was 30 degrees (firefighter assumes classic rappel position)?
W=mg (probably need to separate into x and y components)
W=T1
This isn't a homework problem, but this forum seemed proper for this question. I'm a professional firefighter in California. We just learned this bailout technique and I'm curious as to the science behind why it works. Any insight would be greatly appreciated. Thanks!
-David Anderson
Homework Statement
A FF (m=90kg) is forced to bail out of a window due to extreme heat conditions. He ties off his mass-less rappel rope to a 5kg chair. In order for this procedure to work, the chair cannot move at all while he is rappelling down it. What variables make this work? Is it simply just the friction on the rope? Also, is there a critical angle theta that will make the system catastrophically fail? In other words, if the rope is parallel to the building and perpendicular to the floor (firefighter simply hanging straight up and down), does that make any difference than say if theta was 30 degrees (firefighter assumes classic rappel position)?
Homework Equations
W=mg (probably need to separate into x and y components)
W=T1