Consider an object of mass m being pushed up a frictionless incline of angle theta by a force F parallel to the ground (not the incline). If the object is moving at a constant velocity, the expression for F in terms of m, g (the acceleration due to gravity near the earth's surface, leave it as a letter), and theta is______ (The outcome that I found was F=MgTan(theta) The “not the incline” it confuses me

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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!