Two cars of masses \( \mathrm{m}_{1} \) and \( \mathrm{m}_{2} \) are moving in circles of radii \( \mathrm{r}_{1} \) and \( \mathrm{r}_{2} \) respectively. Their speeds are such that they make complete circles in the same time \( t \). The ratio of their centripetal acceleration is :