Question

Q4. Write the formula of acceleration due to gravityValue of g is more at poles or at equator?
Explain with reason​

Answer 1

Explanation:

Due to earth rotation, centrifugal force(outward force) is more on equator than poles. centrifugal force reduce the gravitational force more at equator and less at poles. so force high means acceleration also high at poles.

Answer 2

• Acceleration due to gravity is the acceleration gained by an object due to the gravitational force. Its SI unit is m/s2. It has both magnitude and direction, hence, it’s a vector quantity. Acceleration due to gravity is represented by g. The standard value of g on the surface of the earth at sea level is 9.8 m/s2.

• As the earth is an oblate spheroid, its radius near the equator is more than its radius near poles. Since for a source mass, the acceleration due to gravity is inversely proportional to the square of the radius of the earth, it varies with latitude due to the shape of the earth.
• gp/ge = R2e/R2p

• Where ge and gp are the accelerations due to gravity at equator and poles, Re and Rp are the radii of earth near equator and poles respectively.
• From the above equation, it is clear that acceleration due to gravity is more at equator and less at poles. So if a person moves from the equator to poles his weight decreases as the value of g decreases.