Question

2. At what height the gravitational field reduces by 75% the
gravitational field at the surface of earth?
(a) R
(b) 2R
(C) 3R
(d) 4R
(where, R is the radius of earth)​

Answer 1

Answer:

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.

Explanation:

It's no 2 R

Answer 2

2r

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. ... Some scientists think there could be as many as one hundred billion galaxies in the universe.