Brain Teasers Optical Illusions Puzzle Hunts Codes & Ciphers Mechanical Puzzles
Personal Links
Browse Teasers
Search Teasers

Two Bullets

Science brain teasers require understanding of the physical or biological world and the laws that govern it.


Puzzle ID:#3610
Fun:*** (2.71)
Difficulty:** (1.24)
Submitted By:bobbrt*****




A piece of firewood is standing on end. Which is more likely to knock the piece of wood over - a lead bullet fired from a gun or a rubber bullet of the same mass travelling at the same speed (and hitting the same spot)?
Assume that the rubber bullet does not disintegrate on impact.


The rubber bullet will be more likely to knock the wood over. The lead bullet will embed itself in the wood, so the wood will have to absorb enough energy to stop the bullet's momentum. The rubber bullet will ricochet off of the wood, so the wood will have to absorb enough energy to stop the bullet PLUS send the bullet back in the opposite direction. The rubber bullet will supply more total force to the wood and will therefore be more likely to knock it over.

What Next?


See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.


Back to Top

Online Now
8 users and 603 guests

Users In Chat
Follow Braingle!
Fold 'N Fly Paper Airplanes
Easy to follow folding instructions and videos.
Copyright © 1999-2017 | FAQ | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise | Braingle Time: 11:06 pm
Sign In Create a free account