A 71.2-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.64 m, and ends with a speed of 8.51 m/s. How much nonconservative work (in kJ) was done on the boy

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

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.

force tends to be low and long diustance masses are high