Question Number 124156 by ajfour last updated on 01/Dec/20
Commented by ajfour last updated on 08/Dec/20
$${Find}\:\frac{{b}}{{R}}\:\:{such}\:{that}\:{in}\:{an}\:{elastic} \\ $$$${collision},\:{between}\:{solid}\:{hemisphere} \\ $$$${and}\:{a}\:{small}\:{sized}\:{ball}\:{dropped} \\ $$$${onto}\:{it},\:{the}\:{hemisphere}\:{receives} \\ $$$${maximum}\:{horizontal}\:{speed}. \\ $$$$\left({Assume}\:{hemisphere}\:{flat}\right. \\ $$$$\:\:{surface}\:{of}\:{hemisphere}\:{remains} \\ $$$${totally}\:{in}\:{contact}\:{with}\:{ground} \\ $$$$\left.{during}\:{impact}\right).\:\:\:\:\:\:\:\: \\ $$