1. ## Logic test!

A bat and ball cost \$1.10. The bat costs \$1 more than the ball. How much does the ball cost?

BAT \$1.05
Ball \$0.05

3. ## Re: Logic test!

The ball costs 5 cents

Edit to add: this once again shows that this is the smartest place on the net

4. ## Re: Logic test!

Your prices are from 1940. Current bat cost is \$37.99. Go from there.

5. ## Re: Logic test!

An oldie, but still a goodie for showing the distinction between Fast and Slow thinking.

6. ## Re: Logic test!

Originally Posted by David G
An oldie, but still a goodie for showing the distinction between Fast and Slow thinking.
Or a basic exercise in AlGebra.

7. ## Re: Logic test!

Can you show your work, PM?

8. ## Re: Logic test!

Yep, it is right there in front of me on a piece of paper.
Do you want me to scan it for you?

9. ## Re: Logic test!

Originally Posted by Peerie Maa
Or a basic exercise in AlGebra.
I normally save the construction of equations for those problems too complex to do in my head. It's an invaluable tool, at need, but an intermediate step that is sometimes superfluous. Of course, some mad blokes ENJOY that process. Until the 12-step program for that particular issue is fully developed and beta tested... I guess we'll just have to leave them to it <G>

10. Originally Posted by George Jung

Price of a ball: x
Price of a bat: x + \$1.00

Price of ball and bat: x + (x + \$1.00) = \$1.10

x + (x + \$1.00) = \$1.10
x + x + \$1.00 = \$1.10
2x + \$1.00 = \$1.10
2x = \$0.10
x = \$0.05

11. ## Re: Logic test!

This is as difficult as deciding whether to vote for Warnock or Walker

12. ## Re: Logic test!

Oh, I dunno... I'm seeing complete agreement!

13. ## Re: Logic test!

just a different logic test

14. ## Re: Logic test!

Which weighs more, a ton of feathers (let’s say a Metric Short Ton), or a ton of bricks?

15. ## Re: Logic test!

Originally Posted by Ralphie Boy
Which weighs more, a ton of feathers (let’s say a Metric Short Ton), or a ton of bricks?
Neither, you silly Ralphie Boy.

16. Senior Member
Join Date
Mar 2009
Posts
2,173

## Re: Logic test!

What is a metric short ton?

1 short ton = 2000 lb
1 long ton = 2240 lb
1 tonne = 1000 kg.

Pardon me, I am a units nerd. Don't get me going on about the various gallons....

17. ## Re: Logic test!

Doh - It should have been either a Metric or a Short Ton! My bad! I forgot people actually know stuff here!

OK, OK, what about this: You are on the moon and drop a brick and a feather from the same height, which one hits the moon dust first?

18. Senior Member
Join Date
Mar 2009
Posts
2,173

## Re: Logic test!

Simultaneous - no air resistance.

19. Senior Member
Join Date
Dec 2003
Location
CT
Posts
993

## Re: Logic test!

[QUOTE=George Jung;6767871]Can you show your work, PM?

I used to get in trouble for not showing my work. To me, the answer was often so obvious I just could not imagine any work was required.

20. ## Re: Logic test!

Originally Posted by Ralphie Boy
Doh - It should have been either a Metric or a Short Ton! My bad! I forgot people actually know stuff here!

OK, OK, what about this: You are on the moon and drop a brick and a feather from the same height, which one hits the moon dust first?

21. ## Re: Logic test!

Originally Posted by Ralphie Boy
Doh - It should have been either a Metric or a Short Ton! My bad! I forgot people actually know stuff here!

OK, OK, what about this: You are on the moon and drop a brick and a feather from the same height, which one hits the moon dust first?
The biggest vacuum chamber in the world is at NASA's Space Power Facility in Sandusky, Ohio. it's 100 feet in diameter and 122 foot tall, and can pull a vacuum better than 4×10^–6 torr (0.00533289474 pascals or 0.00000157498368 inches of mercury).

You can guess what a physics professor can do with a place like that:

22. ## Re: Logic test!

Originally Posted by Ralphie Boy
You are on the moon and drop a brick and a feather from the same height, which one hits the moon dust first?
Are we to include the electrostatic effects of Moon dust in our responses?

Andy

23. Senior Member
Join Date
Feb 2014
Location
Kitty Hawk, NC
Posts
12,357

## Re: Logic test!

Originally Posted by Ralphie Boy
OK, OK, what about this: You are on the moon and drop a brick and a feather from the same height, which one hits the moon dust first?
Physics is a bit harder than that.

If the center of masses are at the same "height", the orientation of the brick and rock will matter.

If the center of masses are at different "heights", the gravitational attraction will be different on each.

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•