Suppose that the 1 kg standard body accelerates at 3.40 m/s2 at 155° from the positive direction of the x axis, owing to two forces, one of which is F1 = (2.6 N)i + (4.8 N)j. What is the other force in unit-vector notation and as a magnitude and direction? i-component of the other force?
The Attempt at a Solution
First I tried to find the x-component of F2.
F2,x = max - F1,x
F2,x = (1)(3.4 cos155) - (2.6 cos 155)
I got F2,x to be -0.725 N but thats not the correct answer
For F2,y I did:
F2,y = may - F1,y
F2,y = (1)(3.4sin 155) - (4.8sin 155)
But its also wrong. Any ideas on what Im doing wrong?