An object is moving forward with a constant velocity. Which statement about this object MUST be true?   Select all that apply   The acceleration of the object is in the forward direction. The net force on the object is zero. None of the above choices are correct. No forces are acting on the object. The net force on the object is in the forward direction.

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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!