Two forces are applied to a car in an effort to move it, as shown in Figure P4.12. Here's Figure P4.12: <img src="http://www.webassign.net/sercp/p4-12.gif"/> (a) What is the resultant of these two forces? Magnitude: N Direction: Degrees (measured to the right from the forward direction) (b) If the car has a mass of 3000 kg, what magnitude acceleration does it have? Ignore friction. For part A, I found F1 = (400cos30)i + (400sin30)j F2 = (450cos10)i + (450sin10)j ___+______________________________ Fnet=[346i + 443i] + [200j + 78.1j] Fnet= 789i + 278.1j I then used the Pythagoreon Thereom to figure out the resultant force. I got 837 N. However, webassign.net says this is wrong and I've been re-doing the problem over and over and get the same answer. I used tan-1 [278/789] for the angle and got 19.4 degrees but webassign.net also tells me this is the wrong answer. Finally, for part B, I used F=ma and used 837=3000a and solved for a. I got a=.279 m/s^2 but again webassign.net tells me this wrong. So, basically, I was hoping someone could look through my work and tell me if you can figure out what I'm doing wrong cause I could swear I did this correctly.