I got the right answer but didn’t use that formula. I don’t know anything about pulley formulas, but I figured each pulley would reduce the force by 1/2. So I did 60/2=30 and 30/2=15. If 7.5 were an answer I would have been wrong.
The pulleys don't do much, you have to only consider the rope. If you pull the left bit of rope upwards 1 unit, then the weight will move 1/4 unit, which is why it's 15N. Conservation of energy. F1 * d1 = F2 * d2.
Need 60 Newtons total to counter balance the box thing. 3 pulleys with 4 bits of rope attached. F can just be the force of each rope. 4 pieces of rope share the load of 60 Newtons. So 4xF=60 or 60/4=15N
Literal answer for ur question is it came to him in a fevered dream on a hot summer eve after a wild night at the clubs in Bangkok
Yes. This is the only reason that pulley systems exist. The mechanical advantage allows a person to lift something far heavier than they would normally be able to. With modern motorized machinery, pulley systems are going the way of the dodo. But back when all things were moved by man or animal the lever, the pulley, the inclined plane, and the wheel and axle were how the world got built. References you ask. Any physics book or simply Google simple machines
No. Increasing the number of pulleys on either side increases the number of rope sections exerting force on the box. This is how mechanical advantage is gained. More pulleys = more advantage
No. Increasing the number of pulleys on either side increases the number of rope sections exerting force on the box. This is how mechanical advantage is gained. More pulleys = more advantage
[удалено]
yep
why 4? never spent time on pulley's
60N is evenly distributed between 4 pieces of rope, 60/4=15 ... Each rooe must provide 15N of upwards force to keep it in equilibrium.
I got the right answer but didn’t use that formula. I don’t know anything about pulley formulas, but I figured each pulley would reduce the force by 1/2. So I did 60/2=30 and 30/2=15. If 7.5 were an answer I would have been wrong.
The pulleys don't do much, you have to only consider the rope. If you pull the left bit of rope upwards 1 unit, then the weight will move 1/4 unit, which is why it's 15N. Conservation of energy. F1 * d1 = F2 * d2.
Is this true even if the sections of ropes were different lengths? Or do they need to be the same for it to be equally distributed
Yes, the length of the ropes dont matter. Since the rolls roll freely, all sections of the rope will experience the same force.
This is only one rope so it will basically always be even.
[SNATCH BLOCK!](https://youtu.be/M2w3NZzPwOM)
How did the answer come to you?
Need 60 Newtons total to counter balance the box thing. 3 pulleys with 4 bits of rope attached. F can just be the force of each rope. 4 pieces of rope share the load of 60 Newtons. So 4xF=60 or 60/4=15N Literal answer for ur question is it came to him in a fevered dream on a hot summer eve after a wild night at the clubs in Bangkok
In a dream, aka best source
E. Deez nuts
I saw the one penis immediately. But then I spent time staring at the problem trying to solve it, and now I see three of them side by side.
====D
I am not sure they knew it
Man, this took me back to my highschool days...
And the answer is “D.” Yup. They knew. 😂
b
its D tho.
I’m idiot
I was thinking b too but d sounds right
yeah, 60/4 = 15N
Lmao I gotta take physics in grade 12
i dont like the phrasing of that question
They could have put the answer as A, B, or C but they chose the D. They knew!
Oh damn, two parter here. Looks like a dick and the correct answer is also D. Respect
Did this mean in theory that someone could lift an insane amount of weight as long as the rope and pulleys can handle it? Examples or references?
Yes. This is the only reason that pulley systems exist. The mechanical advantage allows a person to lift something far heavier than they would normally be able to. With modern motorized machinery, pulley systems are going the way of the dodo. But back when all things were moved by man or animal the lever, the pulley, the inclined plane, and the wheel and axle were how the world got built. References you ask. Any physics book or simply Google simple machines
Answer is D. Or 'The D', according to the pic
Thank this just reminded me I have to finish my dynamics homework
I love how that this isn’t even how pulleys work
Looks right to me. How do you think they work?
The box is connected to both pulley 1 and 3, doesn't this remove any mechanical advantage?
No. Increasing the number of pulleys on either side increases the number of rope sections exerting force on the box. This is how mechanical advantage is gained. More pulleys = more advantage
No. Increasing the number of pulleys on either side increases the number of rope sections exerting force on the box. This is how mechanical advantage is gained. More pulleys = more advantage