CAIE IGCSE Physics 6.1.1.4 Average Orbital Speed Questions

Learn to convert orbital periods consistently and use v = 2πr/T with the correct radius and units.

Exam points

[Maximum number: 3]

The average distance of the Earth from the Sun is $1.5 \times 10^{8} \mathrm{~km}$ .

Calculate the average orbital speed of the Earth in km / h.
average orbital speed = km/h [3]

$110000(\mathrm{~km} / \mathrm{h})$ $(v=) 2 \pi \mathrm{r} / T$ $T=365 \times 24 \mathrm{~h}$ OR $2 \pi \times 1.5 \times 10^{8} / 365 \times 24$

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