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  2. Calculating the Equation of Time: Understanding the Earth's...

    www.physicsforums.com/threads/calculating-the-equation-of-time-understanding...

    Considering orbital velocity as a constant in circular motion, this will be 360deg/365days = 59'10.68" each day and 59'0.98" for a sideral day. Heres is the problem: I don't know how to relate this numbers with elliptical motion by using the eccentricity, that must be necessarily the element that makes the difference.

  3. Solve Orbital Velocity Equation: V=sqrt((g*R^2)/r) - Physics...

    www.physicsforums.com/threads/solve-orbital-velocity-equation-v-sqrt-g-r-2-r...

    The orbital velocity equation, V=sqrt((g*R^2)/r), is used to calculate the velocity required for an object to maintain a stable orbit around a larger body, such as a planet or star. It is derived from Kepler's third law of planetary motion, which states that the square of the orbital period is directly proportional to the cube of the semi-major ...

  4. Vis-viva equation (Orbital Velocity) with massive satellite?

    www.physicsforums.com/threads/vis-viva-equation-orbital-velocity-with-massive...

    The Vis-viva equation, also known as the orbital energy equation, is a mathematical formula used to calculate the velocity of an object in orbit around a central body. It states that the sum of the kinetic and potential energies of the orbiting object is equal to half of the gravitational potential energy between the two bodies.

  5. Can you find orbital velocity from circle equation y^2+x^2=r^2?

    www.physicsforums.com/threads/can-you-find-orbital-velocity-from-circle...

    Orbital velocity is the velocity at which an object must travel in order to maintain a stable orbit around another object, such as a planet or a star. How is orbital velocity related to the circle equation y^2+x^2=r^2?

  6. Why must an orbit become smaller when an orbiting body loses...

    www.physicsforums.com/threads/why-must-an-orbit-become-smaller-when-an...

    2. How is velocity calculated in orbital motion? Velocity in orbital motion is calculated using the formula v = √(GM/r), where G is the universal gravitational constant, M is the mass of the central body, and r is the orbital radius. This equation is known as the vis-viva equation. 3. What is the difference between tangential velocity and ...

  7. How Fast Does Mercury Travel Around the Sun? - Physics Forums

    www.physicsforums.com/threads/how-fast-does-mercury-travel-around-the-sun.131041

    The orbital velocity of Mercury can be calculated using the equation v=2πr/T, where v is the orbital velocity, r is the orbit radius, and T is the orbital period. In this case, the orbit radius (r) is given as 5.79 * 10^7 km and the orbital period (T) is given as 88.0 days.

  8. Exploring the Logical/Geometrical Explanation of Escape Velocity

    www.physicsforums.com/threads/exploring-the-logical-geometrical-explanation-of...

    In summary: So, it's not just a coincidence, it's a result of the form of the force.In summary, the escape velocity is exactly square root 2 times the orbital velocity due to the algebraic necessity of doubling the kinetic energy of the bound orbit to reach zero total energy, as well as the form of the force equations.

  9. Velocity ratio - bodies in orbit - Physics Forums

    www.physicsforums.com/threads/velocity-ratio-bodies-in-orbit.224428

    The velocity ratio in orbit is calculated using the equation: VR = v1/v2, where v1 is the orbital velocity of the first body and v2 is the orbital velocity of the second body. This calculation can be used to determine the relative speeds of two bodies in orbit around each other.

  10. Electron orbital velocity in hydrogen atom? - Physics Forums

    www.physicsforums.com/threads/electron-orbital-velocity-in-hydrogen-atom.763972

    Instead of the velocity v we use the momentum-operator p and define v = p/m. Then we get [tex]\langle v^2\rangle = m^{-2} \langle nlms| p^2 |nlms\rangle[/tex] This is the correct QM equation to define the velocity squared. It works for the Hydrogen case and for other more complicated atoms as well.

  11. Orbital Speed of Earth: Calculating the Speed of Earth's Orbit...

    www.physicsforums.com/threads/orbital-speed-of-earth-calculating-the-speed-of...

    Earth Orbital Orbital speed Speed In summary, the orbital speed of Earth around the sun is approximately 107515.4 km/hour, which can be converted to miles per hour. This is calculated using the formula 2*3.1416*150000000km / 8766 hours, which takes into account the distance of the Earth from the sun and its orbital period.