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When Earth is furthest from the Sun, called aphelion, it is 152,100,000 km from the Sun...

When Earth is furthest from the Sun, called aphelion, it is 152,100,000 km from the Sun and has an orbital speed of 29,290 m/s. What is its orbital speed at perihelion, when it is 147,090,000 km from the Sun?
____________ m/s

Solutions

Expert Solution

we can use the equation

v = sqrt ( GM/r)

here M is mass of sun, not earth which is 2e30 Kg

so,

v = sqrt ( 6.67e-11 * 2e30 / 147090000 * 1000)

v = 3.02e4 m/s

genius_generous answered 2 years ago
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