A-level Physics · Gravitational fields

Gravitational potential

Use V = −GM/r, remembering the minus sign, and the work done moving a mass between two radii.

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Question 1

The Moon has a mass of 7.35×10227.35 \times 10^{22} kg and a radius of 1.74×1061.74 \times 10^{6} m. Calculate the minimum work that must be done to raise a 2000 kg satellite from the surface of the Moon to a height of 2000 km above the surface. Use G = 6.67×10−116.67 \times 10^{-11} N m² kg⁻². Give your answer to 3 significant figures.

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You can type 4.53, 3.2e-5, 3.2 × 10^-5 or 7/3.

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