There are two forces on the 2.80 kg box in the overhead view of the figure but only one is shown. For F1 = 10.9 N, a = 10.2 m/s2, and θ = 34.9°, find the second force (a) in unit-vector notation and as (b) a magnitude and (c) a direction. (State the direction as a negative angle measured from the +x direction.)
I’m not sure if this link will work, but here’s the picture: http://ift.tt/1bYSsVd
2. Relevant equations
3. The attempt at a solution
Ok so I’ve been stuck on this one for a while. I started out finding the sum of the forces:
Then I tried solving for F2:
Then I found the x and y components of the acceleration:
Could you multiply ax and ay by the mass and get the F1x and F1y?
I’m so confused, could someone please help guide me through this problem?