A comet in the Solar System is at the point in its elliptical orbit where it is furthest from the Sun. Which of the following correctly describes its orbital speed and the energy in its gravitational potential store at this point?
Orbital speed is at its maximum; energy in gravitational potential store is at its maximum
Orbital speed is at its maximum; energy in gravitational potential store is at its minimum
Orbital speed is at its minimum; energy in gravitational potential store is at its maximum
Orbital speed is at its minimum; energy in gravitational potential store is at its minimum
100 exam-style questions on CIE IGCSE Physics 6.1 The Earth and the Solar System, covering 6.1.1a Rotation of the Earth, the seasons and the Moon, 6.1.1b Average orbital speed, 6.1.2a Contents of the Solar System, 6.1.2b Formation of the Solar System, 6.1.2c Gravitational field strength of a planet, and 6.1.2d Orbits and gravitational attraction. Each one has a worked solution and a mark scheme showing where the marks go.