Questions tagged [gravitational-force]

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5 votes
2 answers

Joseph Weber's aluminum cylinder

Joseph Weber used a massive aluminum cylinder and measured its deformation, in his attempt to detect gravitational waves. Why did he choose aluminium? Would a solid diamond deform as much as solid ...
8 votes
5 answers

Does the escape velocity formula take into account how a gravitationally bound object's distance to its primary increases before coming back down?

Confusing title, I know. Imagine a perfect, homogenous sphere with an exact radius of $1,000 \text{km}$ and an exact mass of $8 \times 10^{15} \text{kg} $. If you use the formula for escape velocity $...
5 votes
3 answers

What is the force responsible for the output of whiteholes?

When we think of black holes and big celestial objects we think of objects being pulled towards them with a strong force. And that force turns out to be the gravitational force but then for the theory ...
0 votes
0 answers

BH rotating at maximum speed and extremal BH

Academic problem: What should be the rotational speed of a planet at the equator such as there is no surface gravity? Plugging centripetal force=gravitational force... $$mv^2/R=GMm/R^2$$ we get, ...
2 votes
1 answer

Does a planets mass affect its gravitational pull? Let's say earth increased or decreased in mass could that theoretically affect gravity?

This was a random thought I had, and I can't seem to find any answers. I was thinking that if the Earth shrunk that could possibly cause an increase in ...
4 votes
1 answer

Calculating net gravitational force on Uranus

I want to calculate the net/total gravitational force which is being exerted on the planet Uranus. There are many objects in our solar system like the Sun, other planets, moons of other planets, moons ...