GENERAL KNOWLEDGE

Detailed explanation-1: -A: Gravity (or the acceleration due to gravity) is 9.81 meters per second squared, on the surface of Earth, because of the size of Earth and the distance we are on its surface from its center.

Detailed explanation-2: -This means that the earth pulls anything towards it center, which gives the pulled object an acceleration of 9.8 meter, each second, during its ‘fall’ to earth. So the velocity (speed with a direction) of such a body pulled towards the earth increases by about 9.8 meters/second in each second.

Detailed explanation-3: -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.

Detailed explanation-4: -When gravity pulls objects toward the ground, it always causes them to accelerate at a rate of 9.8 m/s2. Regardless of differences in mass, all objects accelerate at the same rate due to gravity unless air resistance affects one more than another.

Detailed explanation-5: -The acceleration due to gravity near the earth’s surface is 9.8 m/s2, and the earth’s radius is 6400 km.