A book about Abraham Lincoln as a boy would be considered O mystery
o fiction adventure
o historical novel

historical novel

Explanation:

because its talking about him when he was a boy

faith or loyalty when pledged in a solemn agreement or undertaking.

the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.