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Two point masses, m1 and m2, lie on the x-axis, with m1 held in place at the origin and m2 at position and free to move. The gravitational potential energy of these masses is found to be U( x) = - Gm1 m2 /x, where is a constant (called the gravitational constant).
Find the x-component of the force acting on m2 due to m1.
Is this force attractive or repulsive?
How do you know?
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