Equilibrium: An object is being acted upon by three forces and as a result moves with a constant velocity. One force is 60.0 N along the +x-axis, and the second is 75.0 N along the +y-axis. What is the magnitude of the third force?
A. 135 N
B. 15.0 N
C. 48.0 N
D. 67.5 N
E. 96.0 N
Answer: E
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