A 200kg drum is pushed up an inclined plane 7.0m long to a platform 1.5m above the starting point. Calculate the work done by the pushing friction if a frictional force of 150N opposes the motion.

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.

friction

explanation:

they us to move forward and backwards