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The universal gravitational constant $G$ has the SI value approximately:Read the answer and worked solution →For a satellite of mass $m$ orbiting Earth at radius $r$ (from the centre), the orbital velocity is:Read the answer and worked solution →The escape velocity from the Earth's surface is approximately ($R = 6.4 \times 10^6$ m, $g = 9.8$ m/s²):Read the answer and worked solution →Newton's law of gravitation states the force between two masses is:Read the answer and worked solution →
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