Two forces A and B applied together on object C.  Force A has an magnitude of 33.3 and making an angle of 34.5 degrees with respect to positive x axis. Force B has  an magnitude of 46 and making an angle of 51 with respect to negative y axis. What is the magnitude of the net force of A and B on object C?

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!