A mapping spacecraft around Ceres is moved from one stable circular orbit to another. In the new orbit, the gravitational force acting on the spacecraft is smaller than before.
Which statement correctly compares the new orbital radius and speed with those in the original orbit?
The orbital radius is smaller and the speed is higher.
The orbital radius is smaller and the speed is lower.
The orbital radius is greater and the speed is higher.
The orbital radius is greater and the speed is lower.
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.