Gravitational fields

The definition of gravitational field strength is:

• The region of space surrounding a body where other bodies will feel an attractive force due to it.
• The region of space surrounding a body where other bodies will feel an repulsive force due to it.
• The region of space surrounding a charge where other charges will feel an attractive force due to it.
• The region of space surrounding a charge where other charges will feel an repulsive force due to it.

Tags

NGSS.HS-PS2-4

How far out from a mass should the gravitational field lines go....

• to where the gravitational field becomes negligable
• to twice the diameter of the mass
• infinitely far
• to four times the diameter of the mass

Tags

NGSS.HS-PS2-4

In this equation...

• G is the gravitational field strength
• r is the distance between the 2 masses
• F is the repulsive gravitational force
• m is the momentum of the mass

Tags

NGSS.HS-PS2-4

The gravitational field strength of Earth is...

• uniform far away from the surface and radial close to the surface
• uniform close to the surface and radial far away from the surface

Tags

NGSS.HS-PS2-4

Gravitational potential at a point is....

• the work done in bringing a unit mass from infinity to the point
• the work done in bringing a unit mass from the point to infinity
• the work done in bringing a unit charge from infinity to the point
• the work done in bringing a unit mass from twice the radius of the mass to the point

Tags

NGSS.HS-PS2-4

An object is moved from A to B in the gravitational field of Earth. The distance between the centre of Earth and B is twice that of A. If the gravitational potential energy of the object at A is –2.0 MJ, what is the gravitational potential energy of the object at B?

• zero
• -0.5MJ
• -1.0MJ
• -4.0MJ