A helicopter's speed increases from 25 m/s to 60 m/s in 5
seconds. What is the acceleration
of this helicopter?

the helis speed increased its speed by 35 m/s. Unless you are asking me what was the speed per second. if you were asking me for the speed per second then that would be a different answer

Explanation:

the body's situation won't change the forces are equal opposit and on the same body

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.