Acceleration Problem

[celect]

Problem:
What is the acceleration of a 20kg pail of cement that is pulled upward (not sideways)
with a force of 300N.
let g= 10m/s^2

Answer:
20kg*10m/s^2 = 200N
a = (300N-200N)/20kg
a = 5m/s^2

The book gives me the answer as 2m/s^2...

did I miss something? I beleive this to be a type o in the book.

[HallsofIvy]

Your answer is correct. You could also have calculated that

The acceleration, neglecting gravity would be ma= 20kg a= 300N so a= 15 m/s2 and, since g= -10 m/s2 the acceleration, after taking gravity into account is 15-10= 5 m/s2.

[Daaf]

Yea prolly a typo