A ball falls from rest through the air towards the ground. The diagram shows two forces acting on the ball. air resistance gravitational force As the ball falls, the air resistance increases. Which statement is correct? A The acceleration of the ball decreases. B The acceleration of the ball increases. C The speed of the ball decreases. D The gravitational force on the ball decreases. A O В C DO

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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!