# Questions tagged [orbital-motion]

The path a body takes while moving through space under the influence of the gravitational forces of other bodies

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### “Tug of war” binary orbit model

Is there in theory any support for this model? As object B moves, object A continues (because of inertia) in tangent of orbit before B moved. Gravitational pull to B, then pulls A back into orbit, ...
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### Conservation Laws that apply to a hyperbolic trajectory

I don't understand why the answer choice is D, I thought for unbound orbits, none of these principles applied? Could someone clear this up for me?
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### What would the shape of orbits of planets be if hypothetically the gravitational force be proportional to the inverse of cube of distance from Sun? [closed]

What would the shape of orbits of planets be if, hypothetically, the gravitational force was proportional to the inverse of cube of distance from the Sun? Please ignore other effects caused due to ...
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### Can the radial oscillations of an elliptical orbit be solved using a fictitious centrifugal potential?

This answer includes the following: The gravitational potential energy is due to the attractive gravitational force, but for an orbiting object there is also a (fictitious) centrifugal force ...
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### How could I calculate the exact amount of force I need to apply to a mass to get it to orbit around another mass?

I am currently taking AP Physics, and we are learning about gravitational forces in planets. We know the equation for gravity: $$F_g=\frac {Gm_1 m_2} {r^2}$$ But, with this equation alongside the ...
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### When is a circle not a circle?

Imagine a 2D uniform circular motion of constant magnitude but changing direction in an area of zero g. The forces will be equal all the way round - it will be a perfect circle. Now imagine the same ...
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### Is Newton’s gravitation law able to explain the circular motion of the earth around the sun?

I have read in Forbes website that the orbit of the earth around the sun is expanding (by 1.5 cm in 2019). I have also heard that big bang theory suggests that the universe would collapse into ...