AIIMS 2018 Physics Effect of Earth's Rotation on Gravity Assertion Reason Question
Assertion: If earth suddenly stops rotating about its axis, then the value of acceleration due to gravity will become same at all the places. Reason: The value of acceleration due to gravity depends upon the rotation of the earth.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion is true because if the Earth were to stop rotating, the centrifugal force caused by its rotation, which slightly reduces the effective acceleration due to gravity (g), would no longer be present, leading to a uniform value of g across the surface. However, the reason is false; while the rotation affects the effective value of g, the actual acceleration due to gravity is primarily determined by the Earth's mass and radius, not its rotation. Options A and B are incorrect because they imply that the reason correctly explains the assertion, which it does not, and option D is incorrect as both statements are not false.
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