Question

why we put a=g?

Answer 1

If something is in free fall, Newton's second law F = ma turns into:
a = g, since F = Weight = mg

Answer 2

alight string can support a stationary hanging load of 25kg before breaking an object of mass m =3kg attatched to the string rotates on a frictionless horizontal table in acircle of radius r =.8m and the other end of the string is held fixed what range of speed can the object have before the string breaks?

Answer 3

Please, open a new question.