A 500-N box is at rest on the floor. Dennis Elbo makes several attempts to move the box, pushing against the box with varying amounts of horizontal force. Yet the box never does move. In this situation, the amount of static friction force experienced by the box ____. Select all that apply. Fstatic = force of static friction FN = normal force has an upper limit and Dennis has not yet exceeded the upper limit must be exactly 500 N is equal to the force with which Dennis exerts on the box is always the coefficient of friction multiplied by the normal force value

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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!