A-level Physics · Gravitational fields

Orbital period

Use T² = 4π²r³/GM for a satellite or planet's period, or the orbit radius for a given period.

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Question 1

A satellite orbits the Earth in a circular orbit at a height of 1270 km above the surface. The Earth has mass 5.97×10245.97 \times 10^{24} kg and radius 6.37×1066.37 \times 10^{6} m. Calculate the orbital period of the satellite in minutes. Use G = 6.67×10−116.67 \times 10^{-11} N m² kg⁻². Give your answer to 3 significant figures.

minutes

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

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