How much suction required to lift?

  • Thread starter Thread starter Lisa Helme
  • Start date Start date
  • Tags Tags
    Lift Suction
AI Thread Summary
The discussion focuses on the suction required to lift objects of varying weights and volumes, particularly in the context of dislodging items from a choking person's throat. It highlights that suction acts unilaterally, which can lead to throat collapse rather than effective lifting. The analogy of using a drinking straw illustrates how decreased rigidity can hinder suction effectiveness. The conversation emphasizes the complexity of applying suction in emergency situations, especially when dealing with choking. Understanding these dynamics is crucial for developing effective methods for dislodging objects safely.
Lisa Helme
Messages
1
Reaction score
0
Hi - am looking for some data points on how much suction is required to lift an object at different weights and volumes.

Especially interested in any data relative to displacing an object caught in the throat if you are choking.

Appreciate any help!
 
Physics news on Phys.org
Lisa Helme said:
Hi - am looking for some data points on how much suction is required to lift an object at different weights and volumes.

Especially interested in any data relative to displacing an object caught in the throat if you are choking.

Appreciate any help!
Well the problem with suction in this sense is that it acts in all directions unilaterally. i.e.
rather than pull an object out, it will have more of a tendency to collapse the throat, making the problem worse.

If you use a drinking straw to drink a milkshake, you're OK as long as the shake isn't too thick, and the straw is rigid. But if you flatten the straw, decreasing its rigidity, it will simply collapse every time you suck on it.
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »

Thread 'Free fall of person in a sled to direct horizontal motion by atmospheric resistance'

Let there be a person in a not yet optimally designed sled at h meters in height. Let this sled free fall but user can steer by tilting their body weight in the sled or by optimal sled shape design point it in some horizontal direction where it is wanted to go - in any horizontal direction but once picked fixed. How to calculate horizontal distance d achievable as function of height h. Thus what is f(h) = d. Put another way, imagine a helicopter rises to a height h, but then shuts off all...
View full post »

Similar threads

Relationship Between Suction Force & Suction Distance
Replies
5
Views
7K
B How Does Inclined Load Affect Weight Distribution When Moving a Cabinet?
Replies
1
Views
1K
Need help in finalizing the vacuum pump to lift an object
Replies
2
Views
2K
I Force Required for Gas Struts on 1972 VW T2 Danbury Pop top campervan?
Replies
9
Views
2K
HVAC Understanding the movement of a fluid in a vertical pipe
Replies
10
Views
6K
Misc. Generating as much suction with as little weight as possible
Replies
10
Views
2K
Calculate calories burned from lifting weights?
Replies
4
Views
8K
How does high humidity affect suction pressure & discharge pressure?
Replies
8
Views
4K
Maximum suction force in a suction cup
Replies
7
Views
3K
Venturi injector suction not adequate
Replies
19
Views
5K

Hot Threads

Recent Insights

Back
Top