A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.35 rad/s(²). If the tangential acceleration of the yo-yo at the end of the string is 0.20 m/s(²), how long is the string? Answer in units of m.
a. ( 0.57 )
b. ( 0.86 )
c. ( 0.35 )
d. ( 0.20 )