A comet follows an elliptical orbit around the Sun. During a short interval near the Sun it travels 1.8 × 105 km in 1.0 h. During a short interval far from the Sun it travels 3.6 × 104 km in 2.0 h.
By what factor is its average speed greater during the interval near the Sun?
2.52.52.5
5.05.05.0
202020
101010
80 exam-style questions on Edexcel GCSE Physics 7.1 The Solar System and gravity, covering 7.1.1 Weight and g on different bodies in space, 7.1.2 The Solar System, 7.1.3 Changing ideas about the Solar System, 7.1.4 Orbits of moons, planets, comets and satellites, and 7.1.5 Gravity and orbital motion. Each one has a worked solution and a mark scheme showing where the marks go.