- #1
- 19,442
- 10,021
Submitted and Judged by @QuantumQuest
Solution credited to: @TSny
RULES:
1) In order for a solution to count, a full derivation or proof must be given. Answers with no proof will be ignored.
2) It is fine to use nontrivial results without proof as long as you cite them and as long as it is "common knowledge to all mathematicians". Whether the latter is satisfied will be decided on a case-by-case basis.
3) If you have seen the problem before and remember the solution, you cannot participate in the solution to that problem.
4) You are allowed to use google, wolframalpha or any other resource. However, you are not allowed to search the question directly. So if the question was to solve an integral, you are allowed to obtain numerical answers from software, you are allowed to search for useful integration techniques, but you cannot type in the integral in wolframalpha to see its solution.
CHALLENGE:
Three point masses ##m_1, m_2## and ##m_3## which are located at the non-collinear points ##P_1, P_2## and ##P_3## respectively can interact only through gravitational attractions. The masses are isolated in space and they have no interaction with other objects. We suppose that an axis ##\sigma## is passing through the center of mass of the system of the three given masses and is perpendicular to the plane of the triangle ##P_1P_2P_3##. Which conditions must angular velocity of the system (regarding given axis) and distances ##P_1P_2 = d_{12}##,##P_2P_3 = d_{23}## and ##P_1P_3 = d_{13}## must satisfy in order the shape and the size of the triangle ##P_1P_2P_3## stay constant, as the system is rotating?
Solution credited to: @TSny
RULES:
1) In order for a solution to count, a full derivation or proof must be given. Answers with no proof will be ignored.
2) It is fine to use nontrivial results without proof as long as you cite them and as long as it is "common knowledge to all mathematicians". Whether the latter is satisfied will be decided on a case-by-case basis.
3) If you have seen the problem before and remember the solution, you cannot participate in the solution to that problem.
4) You are allowed to use google, wolframalpha or any other resource. However, you are not allowed to search the question directly. So if the question was to solve an integral, you are allowed to obtain numerical answers from software, you are allowed to search for useful integration techniques, but you cannot type in the integral in wolframalpha to see its solution.
CHALLENGE:
Three point masses ##m_1, m_2## and ##m_3## which are located at the non-collinear points ##P_1, P_2## and ##P_3## respectively can interact only through gravitational attractions. The masses are isolated in space and they have no interaction with other objects. We suppose that an axis ##\sigma## is passing through the center of mass of the system of the three given masses and is perpendicular to the plane of the triangle ##P_1P_2P_3##. Which conditions must angular velocity of the system (regarding given axis) and distances ##P_1P_2 = d_{12}##,##P_2P_3 = d_{23}## and ##P_1P_3 = d_{13}## must satisfy in order the shape and the size of the triangle ##P_1P_2P_3## stay constant, as the system is rotating?
Last edited: