Physics: Compare planets farther from the sun to those nearer the sun. (a) do the farther planets have (greater or lesser) orbital velocity than the nearer ones? greater or lesser?

The troposphere is responsible for weather, including rain, which protects Earth s inhabitants from drought and starvation....

Compare planets farther from the sun to those nearer

Ответ:

elizabethwaller8104

06.01.2022

Physics

Lesser

Explanation:

The gravitational pull between a planet orbiting the Sun and the Sun is equal to the centripetal force keeping the planet in circular motion:

$G\frac{mM}{r^2}=m\frac{v^2}{r}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2}$ is the gravitational constant

is the mass of the Sun

is the mass of the planet

is the distance between the Sun and the planet

v is the orbital velocity of the planet

We can re-arrange the formula to solve for v, the orbital velocity of the planet:

$v=\sqrt{\frac{GM}{r}}$

We see that the velocity is inversely proportional to the square root of the distance, r: therefore, the farther the planet from the Sun, the lesser the orbital velocity of the planet.

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Compare planets farther from the sun to those nearer the sun. (a) do the farther planets have (greater or lesser) orbital velocity than the nearer ones?
greater or lesser?

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