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Direction : In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:
Assertion : At the centre of earth, a body has a centre of mass but no centre of gravity.
Reason : Acceleration due to gravity at the centre of the earth is zero.
  • a)
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • b)
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • c)
    Assertion is true but reason is false.
  • d)
    Both Assertion and Reason are false.
Correct answer is option 'A'. Can you explain this answer?
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Direction : In each of the following questions, a statement of Assert...
At the centre of the earth value of g is zero, weight of the body is also zero but its mass remains the same. The centre of mass of the body thus remains unchanged.
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Direction : In each of the following questions, a statement of Assert...
Explanation:

  • Assertion: At the centre of earth, a body has a centre of mass but no centre of gravity.

  • Reason: Acceleration due to gravity at the centre of the earth is zero.


Both the assertion and reason are true. However, the reason is the correct explanation of the assertion. This can be understood as follows:


  • Centre of mass: It is the point where the entire mass of an object can be considered to be concentrated.

  • Centre of gravity: It is the point where the entire weight of an object can be considered to be concentrated.

  • At the centre of the earth, the body experiences gravitational forces from all directions. However, the gravitational forces from all directions cancel out each other at the centre of the earth.

  • Therefore, the acceleration due to gravity at the centre of the earth is zero.

  • As the weight of a body is the product of its mass and acceleration due to gravity, the weight of the body becomes zero at the centre of the earth.

  • Thus, at the centre of the earth, a body has a centre of mass but no centre of gravity.


Hence, both assertion and reason are true and reason is the correct explanation of the assertion.
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Community Answer
Direction : In each of the following questions, a statement of Assert...
A) both assertion and reason are true and the reason is correct explanation of assertion
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Direction : In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:Assertion : At the centre of earth, a body has a centre of mass but no centre of gravity.Reason : Acceleration due to gravity at the centre of the earth is zero.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?
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Direction : In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:Assertion : At the centre of earth, a body has a centre of mass but no centre of gravity.Reason : Acceleration due to gravity at the centre of the earth is zero.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction : In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:Assertion : At the centre of earth, a body has a centre of mass but no centre of gravity.Reason : Acceleration due to gravity at the centre of the earth is zero.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction : In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:Assertion : At the centre of earth, a body has a centre of mass but no centre of gravity.Reason : Acceleration due to gravity at the centre of the earth is zero.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?.
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