Question Number 30129 by ajfour last updated on 16/Feb/18
Commented by ajfour last updated on 16/Feb/18
$${Determine}\:{eq}.\:{of}\:{trajectory}\:{of} \\ $$$${a}\:{solid}\:{rubber}\:{ball}\:{of}\:{radius}\:\boldsymbol{{r}},\:{until} \\ $$$${it}\:{rolls}\:{down}\:{without}\:{slipping}. \\ $$