Is there gravity in a hollow sphere?

The gravitational force on an object within a hollow spherical shell is zero. The gravitational force on an object within a uniform spherical mass is linearly proportional to its distance from the sphere’s center of mass (COM).

Why is the gravitational field inside a hollow sphere zero?

According to the shell theorem, spherically symmetric bodies will produce a gravitational field that affects all the external objects outside it as the mass is concentrated in a particular point in the spherically symmetric body. Therefore the gravitational field inside a hollow spherical will be zero.

How can two objects of the same size and shape have different mass?

The mass of an object is equal to its volume times the (average) density. Two objects of the same size can have different masses, and can have the same mass when very different in size: it’s all in the different densities. So tell me does a kilogram of lead have the same size as a kilogram of wood?

Do two objects with the same mass have the same volume?

So if we say two objects have the same mess then can we say that they have the same volume, that they are made of the same material that they have the same amount of matter or that they have the same density. So hence having the same mass doesn’t mean having the same volume.

Is gravity a sphere?

For objects larger than approximately one fifth the size of Earth, gravity (rather than electrostatic forces, for example) will be the dominant force determining their shape. As gravity pulls matter towards other matter, a sphere forms.

How would gravity work on a hollow planet?

The gravity outside the hollow planet “pulls” toward the center. And, given the fact that gravity always “pulls” toward mass regardless of the orientation or configuration of the mass, inside a hollow planet gravity also “pulls” toward the inner surface.

Why do blocks with the same size have different masses?

The object’s volume is no longer sufficient to displace water of the same weight as the object. Yes. density is mass over volume. they have the same volume… so to have different densities they have to have different masses.

Do two objects with the same mass but different densities have the same gravity?

Two spheres of the same mass but different density will have the same gravitational field, by Newtonian gravity, outside their boundary.