в B D A) A planet with half the average distance to the star would have . half the period. B) If area 1 and 3 are equal the time to go from D to E is . the time to go from A to B C) The speed at A . the speed at D D) The planets's average speed between D and E is . the average speed bet ween A and B E) Time to go from B to C is .. time from A to B

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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!