How big does an object have to be for noticeable gravity?

Given the amount of radioactive stuff left in the solar system today (it’s been draining away for the last 5 billion years) an object needs to have a mass between about 1 x 1023 kg and 3 x 1023 kg (between 0.02 and 0.05 Earths, or around 70 million “Deimoses”), give or take.

How big would a spaceship have to be to create gravity?

Artificial gravity at 0.1g and a rotating spacecraft period of 30 s would require a radius of only 22 m (72 ft). Likewise, at a radius of 10 m, a period of just over 6 s would be required to produce standard gravity (at the hips; gravity would be 11\% higher at the feet), while 4.5 s would produce 2g.

How do you make the force of gravity as large as possible?

So as the mass of either object increases, the force of gravitational attraction between them also increases. If the mass of one of the objects is doubled, then the force of gravity between them is doubled. If the mass of one of the objects is tripled, then the force of gravity between them is tripled.

What does FG MG mean?

Fg = mg. where Fg is the weight of the object in Newtons. m is the mass of the object in kg. g is the gravitational field strength in. N/kg or m/s2.

How is Earth’s gravity calculated?

In SI units, G has the value 6.67 × 10-11 Newtons kg-2 m2. The acceleration g=F/m1 due to gravity on the Earth can be calculated by substituting the mass and radii of the Earth into the above equation and hence g= 9.81 m s-2. …

How big does an object have to be to have gravity?

The object needs to be bigger than you, or (most people would say) you’d be attracting it. No matter how small an object is, if it has mass, it has gravity. Another question might be, “How big does something have to be so that you can’t jump off of it?”

Is it possible to create artificial gravity in space?

Let’s be clear, we’re talking about incredibly small gravitational fields here, not the type of ‘artificial gravity’ that’s used throughout science fiction to keep characters on shows like Star Trek and Battlestar Galactica walking, not floating, around spacecraft. As yet, that technology isn’t possible.

How does gravity affect the mass of an object?

So, the closer objects are to each other, the stronger their gravitational pull is. Earth’s gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That’s what gives you weight.

What is gravity according to Albert Einstein?

Albert Einstein described gravity as a curve in space that wraps around an object—such as a star or a planet. If another object is nearby, it is pulled into the curve. Anything that has mass also has gravity. Objects with more mass have more gravity.