Science Something amazing to tell you concerning physics and motion - Page 4

Jenson71 · 06-04-2009, 10:15 AM

This blows my mind.

Okay, say you have two ball bearings. You hold one in your hand and drop it. The other you put in a gun, point it straight forward, as level as the one in your hand, and pull the trigger, sending it hundreds of yards.

Which one lands first?

The one dropped in your hand right? RIGHT!?!?

No, actually they both hit the ground at the same time.

This is because the vertical component of motion is the same for both objects. They both fall vertically the same distance at about 10 meters per second squared (gravity, actually more like 9.8).

But Jenson, Jenson! What about the horizontal component of the gun-fired ball bearing? Actually, when air resistance is small enough to ignore as it is in this case (being that the bearings are exactly alike), the horizontal and vertical components of a projectile's velocity are completely independent of one another.

And, in this experiment, the gun-fired bearing is constantly falling from the moment it is fired. Yes, it looks like it is holding up in a straight line, but, it's actually falling and it's just hard to see with our eyes. And again, it is falling at exactly the same speed as the ball bearing you released in your hand -- the speed of gravity.

Post more cool science things in this thread.

I think I will later post Aristotle vs. Galileo and gravity, for a little history spin on science.

Jenson71 · 06-04-2009, 10:49 AM

Quote:

Originally Posted by MediaCenterJunkie

Another thing...wouldn't the mere action of observing either ball bearing affect the outcome????

No way.

**Baby Lee** · 06-04-2009, 10:49 AM

Here's a good one that those who know, know. And those who don't it's as obtuse as **** to figure.

If you plug the horizontal velocity into the quadratic formul ie -b+/-sqrtb^-4ac/2a, you get two values, one positive and one negative.

What's the significance of the negative value.

nstygma · 06-04-2009, 10:50 AM

explain why two identical atomic clocks will not read the exact same time after a year if one is at sea level and the other is elevated, say, in denver.

Earthling · 06-04-2009, 10:51 AM

Quote:

Originally Posted by Baby Lee

The light rays propigate forward at . . . . the speed of light.

Yep.

**Buehler445** · 06-04-2009, 10:52 AM

Quote:

Originally Posted by nstygma

explain why two identical atomic clocks will not read the exact same time after a year if one is at sea level and the other is elevated, say, in denver.

Time zone.
Posted via Mobile Device

**notorious** · 06-04-2009, 10:53 AM

Quote:

Originally Posted by nstygma

explain why two identical atomic clocks will not read the exact same time after a year if one is at sea level and the other is elevated, say, in denver.

Because the one in the mountains is traveling slightly faster then the one at sea level. The faster an object travels, the more time "slows down" for it.

Jenson71 · 06-04-2009, 10:53 AM

Quote:

Originally Posted by Baby Lee

Here's a good one that those who know, know. And those who don't it's as obtuse as **** to figure.

If you plug the horizontal velocity into the quadratic formul ie -b+/-sqrtb^-4ac/2a, you get two values, one positive and one negative.

What's the significance of the negative value.

Gave me a headache.

nstygma · 06-04-2009, 10:54 AM

Quote:

Originally Posted by Buehler445

Time zone.
Posted via Mobile Device

i'm referring to rate. as in, one clock will be slower

**Buck** · 06-04-2009, 10:54 AM

Quote:

Originally Posted by Baby Lee

Here's a good one that those who know, know. And those who don't it's as obtuse as **** to figure.

If you plug the horizontal velocity into the quadratic formul ie -b+/-sqrtb^-4ac/2a, you get two values, one positive and one negative.

What's the significance of the negative value.

For the n00bs

nstygma · 06-04-2009, 10:54 AM

Quote:

Originally Posted by notorious

Because the one in the mountains is traveling slightly faster then the one at sea level. The faster an object travels, the more time "slows down" for it.

yeah too easy

damaticous · 06-04-2009, 10:54 AM

Quote:

Originally Posted by Radar Chief

Not quite.
A bullet starts to drop the moment it leaves the barrel. Because of that the sites are adjusted so that the barrel is actually aimed higher that what the sites indicate so that the bullet “falls” into the target at the point predicted by the sites.
The sites are also aimed slightly to the right, IIRC, because the bullet comes out spinning and will move slightly from left to right as it travels.

Interesting. That makes sense.

**Baby Lee** · 06-04-2009, 10:56 AM

Quote:

Originally Posted by nstygma

explain why two identical atomic clocks will not read the exact same time after a year if one is at sea level and the other is elevated, say, in denver.

Most of us have something on our person that proves the Theory of Relativity, what is it?

Jenson71 · 06-04-2009, 10:57 AM

This has now passed the surprising success of my last science and math thread: http://chiefsplanet.com/BB/showthread.php?t=201648

**Baby Lee** · 06-04-2009, 10:57 AM

Quote:

Originally Posted by MediaCenterJunkie

For the n00bs

uno ansr?

**notorious** · 06-04-2009, 10:58 AM

Quote:

Originally Posted by nstygma

yeah too easy

Still cool to think about though. Growing up I had a theory that if a person where to travel faster then light away from the Earth, that person would be able to turn around and watch "time" travel backwards on Earth. When I learned that light travels at the same speed relative to the person, it crapped all over my theory LOL.

06-04-2009, 10:15 AM
Jenson71 fides quaerens intellectum Join Date: Oct 2003 Location: United States Casino cash: $8330900	Something amazing to tell you concerning physics and motion This blows my mind. Okay, say you have two ball bearings. You hold one in your hand and drop it. The other you put in a gun, point it straight forward, as level as the one in your hand, and pull the trigger, sending it hundreds of yards. Which one lands first? The one dropped in your hand right? RIGHT!?!? No, actually they both hit the ground at the same time. This is because the vertical component of motion is the same for both objects. They both fall vertically the same distance at about 10 meters per second squared (gravity, actually more like 9.8). But Jenson, Jenson! What about the horizontal component of the gun-fired ball bearing? Actually, when air resistance is small enough to ignore as it is in this case (being that the bearings are exactly alike), the horizontal and vertical components of a projectile's velocity are completely independent of one another. And, in this experiment, the gun-fired bearing is constantly falling from the moment it is fired. Yes, it looks like it is holding up in a straight line, but, it's actually falling and it's just hard to see with our eyes. And again, it is falling at exactly the same speed as the ball bearing you released in your hand -- the speed of gravity. Post more cool science things in this thread. I think I will later post Aristotle vs. Galileo and gravity, for a little history spin on science.
Posts: 15,986

06-04-2009, 10:49 AM	#47
Baby Lee Supporter Join Date: Aug 2000 Casino cash: $8028275	Here's a good one that those who know, know. And those who don't it's as obtuse as **** to figure. If you plug the horizontal velocity into the quadratic formul ie -b+/-sqrtb^-4ac/2a, you get two values, one positive and one negative. What's the significance of the negative value. __________________ We need the kind of courage that can withstand the subtle corruption of the cynics - E.W.
Posts: 95,642

06-04-2009, 10:50 AM	#48
nstygma Veteran Join Date: Nov 2008 Location: ¿ Casino cash: $6939775	explain why two identical atomic clocks will not read the exact same time after a year if one is at sea level and the other is elevated, say, in denver.
Posts: 2,237

06-04-2009, 10:57 AM	#58
Jenson71 fides quaerens intellectum Join Date: Oct 2003 Location: United States Casino cash: $8330900	This has now passed the surprising success of my last science and math thread: http://chiefsplanet.com/BB/showthread.php?t=201648
Posts: 15,986