2. A car weighing 3000kg brakes and stops for 1 min. The coefficient of friction of the
car wheels with the road is 0.02. How fast
was the car moving at the moment of
braking start?

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.

answer: 31, 5556. 952 seconds