Sunday, August 23, 2020

Acceleration due to Gravity

The acceleration due to gravity is the acceleration produced on an object of free fall within gravitational field of a planet(or any astronomical body). Acceleration due to gravity is

  1. Directly proportional to the mass of the planet
  2. Inversely proportional to the square of radius of planet

Combining these two conditions we get the following relation. On earth surface its average value is 9.8 meter per second square and that on moon's surface is 1.6.

Q.  The value of acceleration due to gravity is less in moon’s surface  than that in earth’s surface why?

As the mass of moon is smaller than that of earth value of g on surface of moon is less than that on surface of earth.

Q. If mass of earth is 6.4 x 1024 Kg and its radius is 6400 Km, what is value of g on its surface?

Left for student, answer in comment


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