I am dumb and do not understand gravity

You're right.

You are dumb.

Yes thanks!
But what am I not understanding? Can you explain?

It's what we call "bending moment," which for the cantilevered case you described is force times the distance between the force and the anchorage point.

But there are different formulas depending on the system of anchorage, for example a beam supported at both ends has an end moment of force times length divided by 4.

[link to en.wikipedia.org (secure)]

Force is measured in pounds, moment is measured in foot-pounds.

Torque balance .

Gravitational Force of the mass X radius of the weight from the fulcrum on the pole = force you must exert X radius of your force from the Fulcrum. SInce your radius "r" term is tiny compared to the large "r" term of the weight on the end of the long pole, the force you must exert becomes quite large.

[link to hyperphysics.phy-astr.gsu.edu]


You aren't dumb. Questions are the beginning of wisdom.

Last Edited by JustmeTX on 09/24/2020 06:40 PM

So your saying the 'force' is the distance but the weight stays the same?

But why?

So gravity is a downwards thrust (maybe the aether) that has a drag on matter?

Nope. I'm saying what your arm has to resist is not only the force, but also the moment. In this case, since moment is force times length, as the length increases so does the moment that you must resist.

Even though the force stays the same.

[link to www.enhancestyleteam.com]

Technically, what he is feeling at his shoulder is just a moment or torque, not a bending moment. bending moments are internal and typically used for specifically for beams, etc.

Nobody really knows what gravity is. There are theories, but it remains much of a mystery.

[link to www.space.com (secure)]

I like the way your mind works, you want to know the "why" not just the how.

You are Juicebox.

So what is the moment really?
Why does a weight seem amplified if connected to another mass?

By distance but physically linked?

Lamens terms please

I can accept that. He's qoing to feel the bending moment in the arm though.

[link to youtu.be (secure)]

Give me a long enough lever and I can move the world.

Neither do smart scientist

On flat earth things heavier fall to the ground

On globe earth gravity is used to explain why a spinning ball does not fling off ocean waters...yet butterflies flutter above

Gravity does not exist...

Well technically that is true!
And facinating again we meet distance versus force

Are you wearing the juice box protector?

lets start with force.

push your cup away.

that force is mass (the weight of your hand plus the Newtons/or joules, or btus (british thermal units) kilowatt or horsepower (744 watts)....multiplied by the acceleration...so, force, equals mass, x acceleration...so when your hand impacts the cup, the velocity of the impact multiplied by the combined mass equals the force
we dfine gravity as 9.8 metres per second squared, so, when you drop your lighter, the first foot is free, that is to say, it takes a full second to drop 9.8 metres, the second second it drops nearly 100, depending on density, thus determining terminall velocity
finally, l.la=e.ea where l=load, la= load arm, e=effort and ea=effort arm, thus your weight on pole is affected by the penulum motion and principle of moments as well
so...dont drop ur lighter ever again


:)

How can you claim gravity does not exist?
If you drop something why does it fall?

Is your wife crying in the bread maker again?

OH no before you get weird and ethereal let's put it this way.

let's make this more relatable.

You are on a see-saw with another person.

The see-saw is 10 feet long

You weigh 150 lbs. The kid on the other end is 75 lbs.

You know from experience that if you both sit on that see saw 5 ft. from the center (fulcrum, pivot whatever) that that kid is going to go upward and you are going to go down.

But what happens if the kid stays where he is at and you move closer to the fulcrum, let's say you move 2.5 feet from the fulcrum.

Well experience should show you that in fact the closer you get the less you will be able to drive the kid upward just in the same way that if you grab a wrench closer to the bolt the harder it is to turn.

In this case the moment on his side is 5ft x 75lb = 375 ft*lb

The moment on your side is - (2.5ft x 150lb) = -375 ft*lb

In this case the addition of both your moments about the fulcrum is 0 ft*lb and the see-saw will more or less stay stationary (static).

In the first case you created a moment of -375 ft*lb making you move down.


You moving along the see-saw didn't change your weight or anything magical, it just changed he moment about the fulcrum.

Does that make sense?

Yes exactly! the why and how of gravity just doesn't match up to me!

yes it does thanks! But If I ask why is this what is your answer? G force?

OP, look up “GEAR RATIO”.

Maybe if you had ever found your wife's G spot, she wouldn't cry in the bread maker all of the time.

yes no fuss .

Gravity is actually curved. It seems straight because we are small.