Why is rolling a ball down a hill considered an unbalanced force?

hello

Explanation:

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 170 m during the second 5.5 s of its motion. How far did it roll during the first 5.5 s of motion? Express your answer using two significant . physics.

hope its right

it will eventually stop because of friction

i think its through the fallopian tube

age range would be the answer