A helicopter is initially moving at 9m/s to the left. It

[SuperDuperSunny]

Homework Statement

A helicopter is initially moving at 9 m/s to the left. It then accelerates at 4 m/s^2 to the right for 2s. How far does it travel during the 2 s.
answers:
26 m to the right
17m to the right
10m to the left
5 m to the left
1 m to the left

If you don't want to give me the answer, could you guys just point me in the right direction or give me the formula. This is homework and i have an hour left on my online quiz. Thank you in advance.

Homework Equations

The Attempt at a Solution

 

[BvU]

Can indeed not just give you the answer (I'd be banned from PF according to the rules).
But in this exercise it's the same thing (uniform acceleration) as in the other, plus a vector addition.

Oh, and: my friendly IT helper has a sign on the wall:
Your lack of planning does not constitute an emergency for me !