Solving Net-Force Question: 20 kg Crate, F = 200 N

[Emperor]

Homework Statement

A 20 kg crate is lifted by an upward force of 200 N. The crate's upward acceleration is:

Homework Equations

F = ma

a = F ÷ m

The Attempt at a Solution

I can't for the life of me find the answer to this question (which is supposedly .2 m/s^2). I don't know how to get an answer like that, the best I can come up with is 10 m/s^2 using the formula above. Help will be appreciated, thank you.

 

[ehild]

What forces act on the crate?

ehild