Science Something amazing to tell you concerning physics and motion - Page 34

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.

**Baby Lee** · 06-05-2009, 11:02 AM

Quote:

Originally Posted by MediaCenterJunkie

My only guess is that someone with lets say blue eyes, sees someone counting the amount of people with blue eyes (they can tell that person is counting the people with blue eyes because they themselves can see those people have blue eyes), and they see themselves getting grouped in with that count.

Otherwise, I have no clue.

You're not completely on the wrong track though.

Perhaps the most important aspect is the specific [and complete] wording of the question.

**Buck** · 06-05-2009, 11:09 AM

Okay, I'm guessing this is an easier one.

I haven't read the answer to it, so I am playing along too.

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
(This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)

**Buck** · 06-05-2009, 11:12 AM

I think I already figured it out.

Spoiler!

MagicHef · 06-05-2009, 11:13 AM

Quote:

Originally Posted by MediaCenterJunkie

Okay, I'm guessing this is an easier one.

I haven't read the answer to it, so I am playing along too.

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
(This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)

Short. Umbrella.

**Baby Lee** · 06-05-2009, 11:14 AM

Quote:

Originally Posted by MediaCenterJunkie

Okay, I'm guessing this is an easier one.

I haven't read the answer to it, so I am playing along too.

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
(This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)

He hopes to see the woman at the next funeral.

**Buck** · 06-05-2009, 11:15 AM

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

**Buck** · 06-05-2009, 11:16 AM

Quote:

Originally Posted by Baby Lee

He hopes to see the woman at the next funeral.

What?

Jenson71 · 06-05-2009, 11:17 AM

Quote:

Originally Posted by MediaCenterJunkie

Okay, I'm guessing this is an easier one.

I haven't read the answer to it, so I am playing along too.

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
(This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)

Because he is sleeping with a girl on the 7th floor who happens to have broken windows that lets in a lot of rain. He doesn't want anyone to know this so he won't get off on the 7th when people are in the elevator with him. And he doesn't want to get wet.

He doesn't attempt to get back on the elevator after doing the deed, because the stairs are very close to her room, and he would otherwise have to go down a long hallway.

**Baby Lee** · 06-05-2009, 11:17 AM

Quote:

Originally Posted by MediaCenterJunkie

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

That's not so much a logic question as a magnetic properties question.

EyePod · 06-05-2009, 11:17 AM

Quote:

Originally Posted by MediaCenterJunkie

Okay, I'm guessing this is an easier one.

I haven't read the answer to it, so I am playing along too.

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
(This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)

I'd say that there's a chick he likes to watch who sunbathes on the 7th floor, but he doesn't want other people to know. And she's only out when it's not raining.

**Buck** · 06-05-2009, 11:18 AM

Quote:

Originally Posted by Baby Lee

That's not so much a logic question as a magnetic properties question.

I found it on a logic website, i cant figure it out, and this thread started as a physics thread in the first place.

**Baby Lee** · 06-05-2009, 11:21 AM

Quote:

Originally Posted by MediaCenterJunkie

I found it on a logic website, i cant figure it out, and this thread started as a physics thread in the first place.

Magnets have poles. Touch the end of one to the center of the other. If it sticks, the center touched is the plain iron and the end touched is the magnet. If the end touched tries to deflect to one end or the other of the center touched, the center touched is the magnet and the end touched is the plain iron.

MagicHef · 06-05-2009, 11:37 AM

Hey. Figure mine out.

**Buck** · 06-05-2009, 11:43 AM

Quote:

Originally Posted by MagicHef

Hey. Figure mine out.

I already cheated and read the answer.

**Baby Lee** · 06-05-2009, 11:53 AM

Quote:

Originally Posted by MagicHef

Hey. Figure mine out.

If you're talking to me, I think my clue to MCJ indicates that I've figured it out, though I'll be glad to express it if you wish.

If you're not, disregard

Sorry if a repost.

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

06-05-2009, 11:09 AM	#497
Buck Take a Chill Pill Join Date: Nov 2006 Location: South Carolina Casino cash: $6150295	Okay, I'm guessing this is an easier one. I haven't read the answer to it, so I am playing along too. A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment. Can you explain why? (This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)
Posts: 44,605

06-05-2009, 11:12 AM	#498
Buck Take a Chill Pill Join Date: Nov 2006 Location: South Carolina Casino cash: $6150295	I think I already figured it out. Spoiler! Hes too short to reach the 10 button, but can easily reach the ground floor button, and the highest he can reach is the 7th floor button. On days when there are other people in the elevator he can get them to hit it, and when its raining, he has an umbrella to hit the 10 button
Posts: 44,605

06-05-2009, 11:15 AM	#501
Buck Take a Chill Pill Join Date: Nov 2006 Location: South Carolina Casino cash: $6150295	You are in a room with no metal objects except for two iron rods. Only one of them is a magnet. How can you identify which one is a magnet?
Posts: 44,605

06-05-2009, 11:37 AM	#508
MagicHef The Seated Villain Join Date: Apr 2007 Location: Seattle Casino cash: $550247	Hey. Figure mine out. __________________ With a sack in 61% of his games, SB MVP Von Miller is the most consistent pass rusher in NFL history.
Posts: 10,753