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A2 1 Deformation, Thermal Physics, Circular Motion, SHM and Gravity

Quick questions on Gravitational fields: Newton's law, field strength, potential and satellite orbits - CCEA A-Level Physics

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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The Earth has mass 6.0×1024 kg6.0 \times 10^{24}\ \text{kg} and radius 6.4×106 m6.4 \times 10^{6}\ \text{m}. Find the gravitational field strength at its surface. Take G=6.7×10−11 N m2 kg−2G = 6.7 \times 10^{-11}\ \text{N m}^2\,\text{kg}^{-2}.
What is q2?
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State two features of a geostationary orbit. [2 marks]
What is q3?
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Two planets orbit a star with radii in the ratio 1:41 : 4. Find the ratio of their orbital periods. [2 marks]

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