this rock, known as balanced rock, sits on a thin pedestal of rock in a canyon in idaho. Balanced rock exerts adown ward/an upward force on the pedestal. At the same time ,the pedestal exerts a downward/ an upward force that is equal in size and opposite in direction. That is why balanced rock is stable!

momentum of soft ball three times less than baskey ball

where’s the list ? the question is incomplete

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.