Caroline uses 20 N of force to move a box of books 10 m. How much work
did she do?

Work = (force) x (distance)

Work = (20 N) x (10 m)

Work = 200 Joules

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.