Q65 / 90 · JEE Main 2022 (26 Jun Shift 2) · Physics
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
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
- AAssertion and reason both are correct and reason is correct explanation of assertion.
- BAssertion and reason both are correct but reason is not correct explanation of assertion.
- CAssertion is true but reason is false
- Correct answerDAssertion is false but reason is true
Solution
Value of effective increases as we move from the equator to pole because on the equator its value is less due to earth's rotational motion and consequent centrifugal force.
Moreover, the equator of the earth is at a larger distance from the centre of the earth as compared to the poles. This is another reason why is greater on the pole than the equator.
At the equator, direction of gravitational pull and centrifugal force are in same line, hence net force is towards the centre of the Earth.
Hence, the correct answer is option: 'D'.