An exoplanet, Aurelia-Prime, orbits its host star in a circular path.
The average orbital radius of Aurelia-Prime is 4.50×107 km4.50 \times 10^7\text{ km}4.50×107 km.
The planet takes 18.5 days18.5\text{ days}18.5 days to complete one full orbit around its star.
Calculate the average orbital speed of Aurelia-Prime in metres per second (m s−1\text{m s}^{-1}m s−1). Give your answer in standard form to 3 significant figures.
23 exam-style questions on Edexcel IGCSE Physics Motion in the universe. Each one has a worked solution and a mark scheme showing where the marks go.