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JEE Main 2022 (26 Jun, Shift 2) · Acceleration Due to Gravity

Acceleration Due to Gravity question from JEE Main 2022 (26 Jun, Shift 2)

Q83JEE Main 2022 · 26 JUN · SHIFT 2Medium

Acceleration Due to Gravity

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: If we move from poles to equator, the direction of acceleration due to gravity of earth always points towards the center of earth without any variation in its magnitude. Reason R: At equator, the direction of acceleration due to the gravity is towards the center of earth. In the light of above statements, choose the correct answer from the options given below:

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Answer: (d)

  1. A is false: due to rotation, gg changes in magnitude from pole to equator (gϕ=g−ω2Rcos⁡2ϕg_\phi = g - \omega^2 R\cos^2\phi) and does not point exactly to the centre at other latitudes.
  2. R is true: at the equator the centrifugal term is along the radius, so effective gg points to the centre.
  3. So the answer is (d).
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