The diagram shows a ball moving on a smooth, frictionless track. At each of the 5 points on the track, decide if the ball would experience unbalanced or balanced forces? Write B or U in the boxes below each section. Section 1 Section Sec Section 3 Section 2.

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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!