The apple fell from the tree to the ground because of atmospheric pressure rather than gravity?

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The apple fell from the tree to the ground because of atmospheric pressure rather than gravity ?

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Type: Question • Score: 12 • Views: 2,411 • Replies: 21

[+5] - roger - 10/02/2012And how much higher is it above the apple than below it. Seems like it would be higher below the apple, and send it speeding into orbit.
[+4] - rosborne979 - 10/02/2012[quote="cicibebe"] The apple fell from the tree to the ground because of atmospheric pressure rather than gravity ? [/quote]Just out of curiosity, what do you think causes atmospheric...

@cicibebe,

Cici surely you're somehow joking

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@cicibebe,

Isn't that Thud's first law of falling.

Thud's second law is 'If you push something hard enough it will fall over."

Rap

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@raprap,

Quote:

Thud's second law is 'If you push something hard enough it will fall over."

....unless it's a cube.

Lucy's Rule of Autumn : "The leaves don't fall off the trees, they are scared off by the squirrels!!"

Joe(You can look it up.)Nation

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@cicibebe,

cicibebe wrote:

The apple fell from the tree to the ground because of atmospheric pressure rather than gravity ?

Just out of curiosity, what do you think causes atmospheric pressure?

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@rosborne979,

And how much higher is it above the apple than below it. Seems like it would be higher below the apple, and send it speeding into orbit.

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@rosborne979,

rosborne979 wrote:

cicibebe wrote:

The apple fell from the tree to the ground because of atmospheric pressure rather than gravity ?

Just out of curiosity, what do you think causes atmospheric pressure?

Sleeping cats. That's why many cats don't do anything but sleep during the day. They know that if they're not sleeping during the most of the day and night then the world will run out of breathable atmosphere.

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@cicibebe,

cicibebe wrote:

The apple fell from the tree to the ground because of atmospheric pressure rather than gravity ?

No, the apple fell from the tree because of "Eve's 1st Law of Love"...."If you love me Adam, you'll grap that big red apple, put it in your mouth and make mad, hot love to me and let all humanity suffer the consequences".

So it goes... Shocked

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@Miller,

"What humanity?" said Adam, "It's just the two of us and all these animals."

Joe(Sweetie, watch out, you're about to step on that snake.)Nation

1 Reply

@cicibebe,

Apples usually fall from trees because they are ripe.

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@Joe Nation,

Joe Nation wrote:

"What humanity?" said Adam...

First the "hot love", then the humanity, my dear Adam. Go eat the dam apple and get on with it.

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@cicibebe,

You were confused on simple harmonic motion in a previous thread.

So I got a good question for you. Without gravity, will the pendulum swing?
Or simply put, will a pendulum swing in space?

And I don't want a yes or a no, I want you to show me how you derived the answer Wink

1 Reply

@aspvenom,

Quote:

Without gravity, will the pendulum swing?

Cici that's really a good q and one we should address. My first guess, neglecting friction it would swing around in a circle forever. However then the fulcrum would have to somehow be fixed

So I imagined a pendulum (here and now) turned on its side so its momentum carried sit around in a circle, asking myself, " what if I now let go of the fulcrum" as if in outer space

I concluded that the entire assembly would go off in the direction of its bob at the instant of release, rotating around a new center somewhere between the former pivot and the bob

Somebody help

1 Reply

@dalehileman,

No no, a nomral pendulum even a a normal newton pendulum would require gravity to function as it should. In space, if you fix the pendulum in a place, and released the bob, it wouldn't "swing" without gravity.

If you start the swing on earth, and transported it to space, the elastic collisions will cease after a given time, due to friction... loss of energy.

Don't be misguided by what I wrote above. Even traveling to the farthest depths of space, gravity is present, albeit very very low. I was just playing with Cici...

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@aspvenom,

Quote:

No no, a nomral pendulum even a a normal newton pendulum would require gravity to function as it should.

Sorry Asp if I wasn't clear. I was suggesting you lay it on its side

Quote:

In space, if you fix the pendulum in a place, and released the bob, it wouldn't "swing" without gravity.

Yes no, Asp, I was suggesting one already in motion under the influence of gravity, then magically being transported to outer space

Quote:

If you start the swing on earth, and transported it to space, the elastic collisions will cease after a given time, due to friction... loss of energy.

Yes they would if the pivot were fixed but how could you fix it in outer space

Quote:

…...I was just playing with Cici...

Under other circumstance of age, location, and marital status, I too……..

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The real question is How do you know its "on its side.' in outer space?

Joe(which way is the opposite of neither here nor there?)Nation

1 Reply

A simple pendulum in space will not oscillate, period. It doesn't matter if you start the swing on the surface of the earth, and was somehow "magically transported" to space. The moment the pendulum reaches an environmental with negligible gravity, the apparent weight of the whole pendulum will be zero.
When looking at the period of the pendulum.
T=2π √(L/g). As g→0, the period of the simple pendulum goes to infinity.

In layman's term, the string or the rod of the pendulum will be going at the same speed as the rest of it.

1 Reply

@Joe Nation,

Quote:

The real question is How do you know its "on its side.' in outer space?

Sorry Joe if I wasn't clear. In outer space of course it wouldn't matter

--unless it got too close to a large body of some kind

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@Enzo,

touché

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@aspvenom,

Quote:

the farthest depths of space, gravity is present, albeit very very low

so you contend that all space contains mass?

1 Reply

The apple fell from the tree to the ground because of atmospheric pressure rather than gravity?

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