Answer the following question in detail. At which place on the Earth’s surface is the gravitational acceleration minimum? Why? - Physics

Answer the following question in detail.

At which place on the Earth’s surface is the gravitational acceleration minimum? Why?

Solution

1. Gravitational acceleration on the surface of the Earth depends on latitude of the place as well as the rotation and shape of the Earth.
2. At equator, latitude θ = 0°.
∴ g' = g - Rω2
i.e., the acceleration due to gravity is reduced by amount Rω2 (≈ 0.034 m/s2) at equator.
3. Also, the shape of the Earth is actually an ellipsoid, bulged at the equator. The equatorial radius of the Earth is 6378 km, which is maximum. As g ∝ 1/"R"^2, acceleration due to gravity is minimum on the equator i.e., 9.7804 m/s2.
Concept: Variation in the Acceleration Due to Gravity with Altitude, Depth, Latitude and Shape
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APPEARS IN

Balbharati Physics 11th Standard Maharashtra State Board
Chapter 5 Gravitation
Exercises | Q 3. (viii) | Page 98