Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
You are not logged in.
Post a reply
Topic review (newest first)
Thank-you for the explanation mathsyperson. It makes sense (says the person with dyscalculia:)) I will just give him this gimmicky version when I see him next and surprise him with a better one at Xmas time than.
If it's gimmicky, then it's likely that not so much care would have been made to make sure it works properly, so the forces would be unbalanced and it would stop relatively quickly. As you've said, the strings are bent and the alignment isn't perfect, so every time one of the balls hits another some of the energy is being wasted. The size of it matters as well though. If you have two Newton's Cradles that are made in exactly the same way but one is bigger, then the bigger one will go for longer.
Thank you for replying. I'm glad I'm not insane for thinking this. I wonder if its size could be a factor? Each ball is very tiny and it only stands at maybe 3 inches tall. It's just a little gimmicky version so I'm thinking of buying a proper one with a wooden stand.
I agree, the inevitable friction will slow it down, but it should run for a minute or so ... long enough to be satisfying.
Ideally, it won't stop. However, several factors get into our way, the two main ones being:
This is probably the most ridiculous question but I have this idea in my head that when the balls of a newton's cradle are set in motion that they are 'never' suppose to stop and my mind just won't rest until I know if this is true or not. I bought one as a gift and I'm convinced it's broken because it stops within seconds, and I'm wondering if it's not balanced right. The bent strings and not-so-perfect alignment of it makes me think this, too.