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11. Gravitation
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Q6 of 81 Page 225

Find the acceleration due to gravity of the moon at a point 1000 Km above the moon’s surface. The mass of the moon is 7.4 × 1022 kg and its radius is 1740 km.

The mass of the moon is , radius is

Distance of the point from surface,


Total distance from the center,


We know acceleration due to gravity is given by,



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Two small bodies of masses 10 kg and 20 kg are kept a distance of 1.0 m apart and released. Assuming that only mutual gravitational forces are acting, find the speed of particles when the separation decreases to 0.5 m.

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Questions · 81
11. Gravitation
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