Question
Suppose a planet with a mass of 2.14 ✕ 10^25 kg is orbiting a star with a mass of 4.05 ✕ 10^31 kg, and the mean distance between the planet and the star is 1.22 ✕ 10^12 m.
Using Newton's law of universal gravity, determine the speed of the planet when it is at the mean distance from the star.
Using Newton's law of universal gravity, determine the speed of the planet when it is at the mean distance from the star.
Answers
Anonymous
F = G m M /R^2 = m v^2/R
note m, the planet mass, is irrelevant. If you are on a project orbiting earth and drop a wrench, it orbits beside you :)
v^2 = G M/R
note m, the planet mass, is irrelevant. If you are on a project orbiting earth and drop a wrench, it orbits beside you :)
v^2 = G M/R
oobleck
how can you "drop" a wrench in zero gravity?
Asking for a friend ...
Asking for a friend ...
Anonymous
You just set it beside you and it stays there :)