(a) Find the net gravitational force exerted by these objects on a 63.0 kg object placed midway between them. magnitude direction N toward the 475 kg mass (b) At what position (other than infinitely remote ones) can the 63.0 kg object be placed so as to experience a net force of zero? m from the 475 kg mass

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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!