Assertion :Mass is a measure of inertia of the body. Reason: Greater the mass, greater is the force required to change its state of rest or of uniform motion.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion Inertia is the resistance of any physical object to any change in its state of motion. It is the parameter used to describe the motion of the object and how it is affected by the applied force. And the mass(m) is the measure of it. Again →F=md→vdt. So force is proportional to mass. So, greater the mass, greater is the force required to change its state of rest or of uniform motion.