Tension in Chain in Multiple Pulley Station

AI Thread Summary
The discussion revolves around calculating the tension in a pulley system used to lift a 44 kg crate at constant speed. The initial incorrect answer was based on the assumption that the weight was evenly distributed between two tensions, resulting in 215.6N. The correct approach recognizes that the total weight of the crate, calculated as mg (431.2N), equals the tension in the chain when in equilibrium. The tension in the chain to the ceiling balances the weight of the crate, confirming that mg = T. The final conclusion emphasizes that the tension in the chain is equal to the weight of the crate when lifted at constant speed.
magnumxlv
Messages
2
Reaction score
0
This is for a graded online homework due at 11. I got everything else on it right, but this is giving me trouble for some reason. We get to resubmit answers once, and my first answer of 215.6N was wrong

Question: The pulley system in the figure is used to lift a crate of mass m = 44 kg. Note that a chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume that the masses of the chains, pulleys, and ropes are negligible. Determine the tension in each chain when the crate is being lifted with constant speed.

Diagram: https://jshare.johnshopkins.edu/amian3/public_html/pulleysystem.gif?uniq=-25jd0a

Initially, I figured the weight of the object would be distributed by the 2 tensions to the ceiling so I answered mg/2 which was 44*9.8/2 = 215.6N.

If anyone could help me out it'd be much appreciated, thank you.
 
Physics news on Phys.org
Figured it out. It's just m*g = 431.2N. The Tension of the rope to the ceiling and the pulling force cancel out b/c its in equilibrium, so you just have the tension force going upward and mg going down so mg - T = 0, mg = T.
 
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...

Similar threads

Replies
12
Views
1K
Replies
38
Views
4K
Replies
22
Views
6K
Replies
2
Views
2K
Replies
10
Views
2K
Replies
8
Views
3K
Replies
6
Views
3K
Back
Top