1. The problem statement, all variables and given/known data a kitten pushes a ball of yarn rolling toward it at 1.00 cm/s with its nose, displacing the ball of yarn 17.5 cm in the opposite direction in 2.00 s. What is the acceleration of the ball of yarn? 2. Relevant equations 3. The attempt at a solution i used x=1/2(Vi+Vf)t to find the final velocity and i got 16.5. than i used the vf=vi+at and got 7.75m/s^2 for the acceleration but my teacher told me its wrong so i have no clue like what i did wrong?