9.1 Una llave de tuercas de 0.5 kg cae desde una altura de 10m. ¿Cual es su cantidad de movimiento inmediatamente antes de tocar el suelo?

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

continuous conducting path for current, power supply