When a falling meteoroid is at a distance above the earth's surface of 2.60 times the earth's radius, what is its acceleration due to the earth's gravitation?

The gravitational acceleration at any distance r is given by

where G is the gravitational constant, M the Earth's mass and r is the distance measured from the center of the Earth.

The Earth's radius is , so the meteoroid is located at a distance of:

And by substituting this value into the previous formula, we can find the value of g at that altitude:

g =0.76 m/s^2

Explanation: The gravitational acceleration is calculated with the equation.

g = G*M/r^

Where G is a constant of gravitation, M is the mass of the Earth and r is the distance of the meteoroid to the earth (to the center of the earth).

G = 6.67408×10^-11 m^3*kg^-1*s^-2

Earth radius = 6371km

M = 5.972 × 10^24 kg

and we know that r = 2.6 times the radius of the earth + radius of the earth, so r = 3.6*6371km

and we need to write this in meters, so r = 3.6*6371*1000m

and g = (6.67408×10^-11 m^3*kg^-1*s^-2)( 5.972 × 10^24 kg)/(3.6*1000*6371m)^2

= 0.76 m/s^2

double the distance = divide strength by 4

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia