A net force F acts on a mass m and produces an acceleration a. If the mass of the object was 4m, and the acceleration of the mass was the same, what would be the amount of the applied net force?

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.