?ÿ
?ÿAnd for the thinkalcholics.....
Exactly, when I'm on a diet I cut them vertically and when I'm hungry, I cut them diagonally.
@lurker?ÿ
That's why I cut my pizza in 4 slices; because I don't think I could eat 8.
And for the thinkalcholics.....
What is keeping the left hand rope vertical? If nothing, then the pulley is going to swing to the right and change the angles.
What is keeping the left hand rope vertical
Isn't it the weight?
It is usual in such problems to assume the pulleys and ropes are massless and friction in the pulleys is neglected. I would assume that this is in typical earth gravity (to convert to force in Newtons) and oriented so the picture box is level.
The weight is not hanging freely on the ropes, or it would be (nearly) midway between the supports.
If we assume the weight is sitting on the floor, we can calculate the force needed to lift it microscopically so it will then start to slide sideways. The lifting force depends on the cosines of the angles from the bottom pulley. The angle where we pull is irrelevant except to let us compute the angle of the almost vertical rope. The left hand rope is now 1?ø off vertical.
If the weight is being held by some some other sideways force, and then let go so it swings toward center, we have to calculate new rope angles. In that case, we need the diameter of the pulleys. We can perhaps approximate that (if equal) from the given information, or solve for it exactly if we change the vertical dimension given to be to the point where the rope is attached, and to a specified point on the upper pulley. As shown, we don't know the height of the top pivot points, as they are not at the dimensioned ceiling.
Note that after we find a starting force, the force needed will increase as the weight is raised because of the increasing angle the ropes make. How much this happens depends on the horizontal spacing, hence we need to find the pulley diameter.
60kg.
OCD maxing out
The sheave rotates inside the pulley.
Give it good kick or two to get to 60. ?????ÿ
OCD maxing out
The sheave rotates inside the pulley.
?ÿ?ÿ
I've never heard a song about "Bringing in the Pulley's" before. ????
@flga-2-2?ÿ
You are confusing the harvest bundles (sheeeves) that Knowles (Fur Neck) Shaw made famous with sheaves (shivs).?ÿ Not be be confused with sharpened toothbrushes and such items routinely confiscated in jails.
What is the difference between a pulley and sheave?
A pulley is one of six types of simple machines.?ÿA sheave (pronounced ??shiv?) is actually part of the pulley system. The sheave is the rotating, grooved wheel inside the pulley. This is the piece that the rope fits into.Mar 13, 2018
I've never heard a song about "Bringing in the Pulley's" before. ????
You would have gotten a like for the joke, but I can't like it because you used an apostrophe on the plural. No, no, no.
60kg.
Wrong because A) kg is not a force. Metric force unit is Newtons, which requires us to assume a gravity value and B) it is more than than you think because the ropes don't both pull straight up.
