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29 November, 18:29

Determine to three significant figures the gravitational force acting between two spheres that are touching each other. The mass of each sphere is 900kg and the radius is 200mm.

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  1. 29 November, 18:59
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    The gravitational force acting between two objects is calculated by,

    F = G x (m1 x m2) / d²

    where G is the universal gravitational constant, m1 and m2 are the masses of the objects, and d is the distance between them. The distance between the spheres is twice the measure of the radius.

    Substituting,

    F = (6.674 x 10^-11) x (900 kg x 900 kg) / (0.40 m) ²

    Thus, the gravitational force between the spheres is approximately 3.378x10^-4 N.
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