Calculate the kinetic energy of a 5.2kg object moving at 2.4m/s.

calculate the potential energy of 5.2 kg object potential 5.8m above the ground. their both different answered. can someone me how to do this? and how to calculate the speed?

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.