Question

The orbital radius of Venus
is 10.8 x 1010 m. Its rotation
period is 224.7 days. What is its
orbital speed?
A 20 km s-1 C 35 km s-1
B 25 km s-1 D 62 km 5-1
​

Answer 1

Answer:

v = 35 km/s

Explanation:

Given that,

Orbital radius of Venus, $r=10.8\times 10^{10}\ m=10.8\times 10^{10}\times 10^{-3}=10.8\times 10^{7}\ km$

The rotation period is, $T = 224.7\ \text{days}=19414080\ s$

We need to find the orbital speed of the Venus. The formula for the orbital speed is given by :

$v=\dfrac{2\pi r}{T}\\\\v=\dfrac{2\pi \times 10.8\times 10^{7}}{19414080}\\\\=34.95\ km/s$

or

v = 35 km/s

So, the orbital speed of Venus is 35 km/s.