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Gravitational fields (A-level only)

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Question 18

Two satellites, $P\,$ and $Q$ , orbit a planet of mass $M\,$ in stable circular orbits. The mass of satellite $P\,$ is three times the mass of satellite $Q$ ( $m_P = 3m_Q$ ), and the orbital radius of $P\,$ is four times the orbital radius of $Q$ ( $r_P = 4r_Q$ ).

What is the ratio of the kinetic energy of $P\,$ to the kinetic energy of $Q$ , $Ek,PEk,Q\displaystyle \frac{E_{k,P}}{E_{k,Q}}$ ?

$0.1875$

$0.75$

$1.5$

$12.0$

Markscheme

Gravitational fields (A-level only) Questions

A Level
Physics
Gravitational fields (A-level only)

52 exam-style questions on AQA A Level Physics Gravitational fields (A-level only), covering Newton's law (A-level only), Gravitational field strength (A-level only), Gravitational potential (A-level only), and Orbits of planets and satellites (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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