20. What is the gravitational force of attraction between two 60kg and boy girl siting 2 m apart? Will their attraction increase or decrease when they are in a distance 1 m apart? D= 2m, m1 -60 kg, m2 =60kg (G = 6.67 x 10" Nm2kg), F= G (m¡m2)/d²

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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!