Sup all. I need help setting this problem up. A right-triangular current loop has two 45° angles and a hypotenuse a = 5 cm. The loop lies in the x-y plane, with its hypotenuse parallel to the y-axis. A net current I = 0.42 A circulates in the loop in the direction shown in the figure. A spatially uniform magnetic field B = 0.3 T points in the +x direction. The +z direction is OUT of the screen. Calculate: 1) F_Z (AB)=? 2) F_Z (BC)=? 3) F_Z (CA)=? Where F_Z is the magnetic force in the Z direction on side AB, BC, or CA. Now, I know that Force_B = iLxB where L is length of side and B is the magnetic field. Obviously, I have to do some cross product action here. I know so far that the answer for 1) is (.42A)(.05m)(.3T) sin theta=-.0063N. Now, I'm not sure why that is the answer. Is it because the angle is 270 degrees, and thats why the answer is negative? I'm stuck on the last two. I do know that the answer for 3 is either going to be the same as 2, or equal in magnitude but opposite in sign is my guess. Any help greatly appreciated.