A planet travels round the Sun with orbital period $T$. The mean radius of the path is $r$. What is the planet’s mean orbital speed?
- A$2\pi r T$
- B$\frac{2\pi r}{T}$
- C$\frac{T}{2\pi r}$
- D$\frac{\pi r}{2T}$
Physics 0625 · IGCSE · Motion
Physics 0625 · IGCSE · Motion
A planet travels round the Sun with orbital period $T$. The mean radius of the path is $r$. What is the planet’s mean orbital speed?