Perpetual Motion Balls: Buy & Learn What You Need

[justjoshus]

What do you call and where can i buy the set of balls (maybe 4 or 5) suspended in strings and when the outermost ball hits the the next one and bounces off the last one on the other end and sets off perpetual motion? I surely appreciate any ones response. Thank you. Josh

 

[Doc Al]

Do a search on "Newton's Cradle" or "Newton's Balls".

 

[Dadface]

Hello justjoshus.You are describing "Newtons cradle" so try googling for suppliers.There is no such thing as perpetual motion and the balls in Newtons cradle stop eventually.

 

[alxm]

I wonder how long it'd go on in a vacuum. I'm guessing air resistance is by far the biggest source of losses.
I'm guessing it'd go on for a surprising amount of time. Anyone got a high vacuum to try it out in?

 

[Dadface]

It would go on for longer in a vacuum but another major source of energy loss is due to the fact that during impact the balls get slightly distorted.

 

[Archosaur]

It would go on for longer in a vacuum but another major source of energy loss is due to the fact that during impact the balls get slightly distorted.

Which generates heat and sound (which dissipates as heat).

 

[ezrsedthndun]

if magnets are involved in any mechanism of motion but it kept the motion consistent from other variables is it still considered perpetual motion??