A horizontal crane arm is mounted on a pivot point on the top of a vertical tower (the mass of the crane arm itself is negligible). A 500kg load is hanging from the right end of the arm, 30m to the right of the tower. Where on the arm must the 24,000kg counterweight be placed in order for the arm to be balanced (static equilibrium)?

compass can be used day and night, cloudy or sunny

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.