An object is being acted upon by three forces and moves with a constant velocity. One force is 60 N along the +x-axis, the

Question

An object is being acted upon by three forces and moves with a constant velocity. One force is 60 N along the +x-axis, the second is 75 N along a direction making a counterclockwise angle of 150° with the +x-axis. 
(a) What is the magnitude of the third force? 
(b) What is the direction of the third force, measured clockwise from the +x-axis?

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