A planet in a circular orbit takes a time T to orbit its sun at a radial distance r. In terms of r and T, how fast is the planet moving in its orbit?
Speed of planet in the orbit.
Answer to Problem 48A
The speed of planet in its orbit is
Explanation of Solution
Given:
Distance of planet from its Sun is
Time taken by the planet to orbit its Sun is
Orbit is circular.
Formula Used:
The speed is given as,
Where,
Calculation:
As the orbit of planet is circular.
So, the distance moved by planet in one revolution is
Time taken by the planet to orbit its Sun is
So, the speed of planet in its orbit is
Conclusion:
Therefore, the speed of planet in its orbit is
Chapter 14 Solutions
Conceptual Physics: The High School Physics Program
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