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Mar 10, 2022 at 5:46 history edited athin CC BY-SA 4.0
added 3 characters in body
Apr 29, 2019 at 4:55 answer added piojo timeline score: 2
Apr 28, 2019 at 2:20 answer added Alec timeline score: 3
Apr 27, 2019 at 1:45 comment added Mazura Then the accepted answer would need a second [thing] and a knot that would fit through it. What you presume to be weight is actually resistance.
Apr 27, 2019 at 0:15 comment added athin @Mazura the box is not moved at all
Apr 26, 2019 at 22:30 comment added Mazura Did the box move half a foot when you pulled the rope a foot?...
S Apr 26, 2019 at 15:28 history suggested Nuclear Hoagie CC BY-SA 4.0
Changed reduction in weight to a change in exerted force, as the weight of an object doesn't change
Apr 26, 2019 at 15:10 review Suggested edits
S Apr 26, 2019 at 15:28
Apr 26, 2019 at 15:04 comment added Nuclear Hoagie @athin OK, so what's actually happening is that the box weighs twice as much (not the same amount) when pulling both ropes compared to when pulling with either rope individually. Because the weight of the box doubles when using both arms, the force exerted by a single arm is identical in all 3 cases (left arm, right arm, both arms).
Apr 26, 2019 at 14:54 comment added noedne @NuclearWang You should expect the total force to remain the same, so the force for each hand should be halved.
Apr 26, 2019 at 14:49 comment added athin Hm I should write a better words.. What I mean is that if a weight is tied to both ropes, when I use my both hands indeed the weight is the same but the force (or power?) to pull them should be halved. But here, same. Maybe my previous comment should clarify this ><
Apr 26, 2019 at 14:43 comment added Nuclear Hoagie I agree with @noedne, I don't understand why this is unexpected. I can tie any object to two ropes, and its weight doesn't change if I lift it with one hand, the other hand, or both hands. Why is a weight tied to two ropes an "amazing contraption"?
Apr 26, 2019 at 14:02 vote accept athin
Apr 26, 2019 at 13:35 answer added cinico timeline score: 1
Apr 26, 2019 at 13:10 answer added user59880 timeline score: 5
Apr 26, 2019 at 11:35 answer added cinico timeline score: 4
Apr 26, 2019 at 11:13 history became hot network question
Apr 26, 2019 at 11:03 answer added Bass timeline score: 18
Apr 26, 2019 at 10:47 answer added hexomino timeline score: 12
Apr 26, 2019 at 10:45 answer added noedne timeline score: 19
Apr 26, 2019 at 10:35 comment added athin @ArnaudMortier The measurement can be exact. Say, you need $x$ Newton to perform those $3$ pullings. (Well, for the third one, it should be $2x$ Newton in total as using both of hands $= x + x$.)
Apr 26, 2019 at 10:34 comment added athin @noedne Given the final contraption, it's expected to behave as the story.
Apr 26, 2019 at 10:31 comment added Arnaud Mortier @noedne Ten people can lift a small car, one person cannot.
Apr 26, 2019 at 10:30 comment added Arnaud Mortier Do you measure how hard it is to lift the weight or to keep it in a high position, or both?
Apr 26, 2019 at 10:21 history asked athin CC BY-SA 4.0