10. The figure shows two forces acting at right angles on an object. They have magnitudes /7 = 6.3 N and /5 = 2.1 N. What third force will cause the object to be in equilibrium (acceleration equals zero)? -8 F, f' 1 11. Two forces act on a 55-kg object. One force has magnitude 65 N directed 59 clockwise from the positive x- axis, and the other has a magnitude 35 N at 32 clockwise from the positive y-axis. What is the magnitude of this object's acceleration