# How would a newtons cradle act in zero gravity?

I imagine that the first ball would strike the rest as normal, but what would the last ball do, without gravity to swing it back?

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You might have to throw the first ball rather than just letting go. –  Henry Sep 11 '11 at 22:51

It would rotate around through most of a 360${}^{\circ}$ arc, until it collided with the second to last ball on its way back around. Then the whole thing would end up mucked up.