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Planet X has a mass twice that of Earth. The acceleration due to gravity on the surface of this
planet is half that on the surface of Earth.
If Earth has a radius of 1, what is the radius of Planet X?
B
The table shows data about the solar system.
What would be the period of another planet if it orbited the Sun at an average distance of 3.5 AU?
B
B
Long-period comets, such as Comet Kohoutek, are believed to come from the Oort cloud that lies far beyond the outermost planets. In our solar system, Kohoutek travels in an elliptical orbit around the Sun and spends most of its time beyond the outermost planets.
Explain how the motion of Comet Kohoutek in its orbit supports Kepler’s second law. Include a diagram in your answer. (3 marks)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A rocket carrying a satellite is launched from Earth. Once the rocket engine is switched off the satellite continues in an elliptical orbit.
Explain the satellite’s changes in energy during this journey. (3 marks)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A bullet is fired vertically from the surface of Mars, at the escape velocity of Mars. Another bullet is fired vertically from the surface of Earth, at the escape velocity of Earth.
Neglecting air resistance, compare the energy transformations of the two bullets. (5 marks)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A student used the following scale diagram to investigate orbital properties. The diagram shows a planet and two of its moons, V and W. The distances between each of the moons and the planet are to scale while the sizes of the objects are not.
Complete the table to compare the orbital properties of Moon V and Moon W. Show relevant calculations in the space below the table. (4 marks)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.