On a distant planet, an astronaut drops a steel ball from a height of 150 meters. He observes that it takes 10 seconds for the ball to reach the surface of the planet. The distance that the ball falls from the starting point is recorded with the instruments that he carries in his spaceship, with this, he generates the table shown below. Using the data provided, determine the gravitational acceleration corresponding to the planet the astronaut is on. Write the answer using two significant figures. Heigh m    // time seconds

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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!