FunTrivia Homepage New Questions Unanswered Post a Question Goto Qn # Archives

# There is a popular toy consisting of five steel balls, all of the same size and mass, hanging side by side in a row (many people keep them on their desks). Pull out the end ball and drop it against the row, and one pops of the other end. If two balls are pulled aside and dropped together, two pop out from the other end. The balls seem to count! How do they accomplish this trick?

Question #24027. Asked by Impress me. (Nov 07 02 1:30 AM)

Friar Tuck

This ia called a Newtons Cradle The gracefully swinging and clacking-colliding balls, demonstrate Newtons Third Law of Motion: that for every action force there is an equal and opposite reaction force.

 Nov 07 02, 7:32 AM
Barrow boy

The Newton's Cradle demonstrates the principle of conservation of energy. When one ball is swung into the other four, nearly all the kinetic energy is transferred through all the others to the ball on the far side which then swings out away from the others. When TWO balls are swung out the energy is doubled. When that doubled energy is transferred through the other balls, it is large enough that it can propel both balls at the far end. The whole thing works because each ball weighs the same as its fellows. If you used balls of different weights all sorts of funny interactions would occur.

 Nov 07 02, 11:32 AM

### Other Similar Questions & Answers

 The total number of pool balls in a game of 8 ball minus the total number of pool balls in a game of 9 ball equals how many pool balls?

### Suggested Related FunTrivia Quizzes - 90,000 currently online

1 Balls
 Don't be fooled by the title! Balls apply to many things, so let's see what bounces in this quiz.
Thematic 10Q Average Average
10 Q
funnytrivianna
May 12 08
1818 plays
2 Balls!
 As any regular listeners of the BBC radio comedy "I'm Sorry I Haven't A Clue" will surely agree, one of the truly great and defining rounds is the Balls.
I'm Sorry I Haven't A Clue Very Difficult
5 Q
Wibble
Nov 24 03
465 plays
3 In the "End"
 The answer to all the questions in this quiz will contain the letters e-n-d, in order. Good luck!
Words in Common Difficult
10 Q
me132
Jun 20 06
645 plays

"Ask FunTrivia" is for entertainment purposes only, and answers offered are unverified and unchecked by FunTrivia. We cannot guarantee the accuracy or veracity of ANY statement posted. Feel free to post an updated response if you feel that an answer is inadequate or incorrect. Please thoroughly research items where accuracy is important to you using multiple reliable sources. By accessing our website, you agree to be bound by our terms of service.