Physics
Assertion (A) : Inertia is an inherent property of each body by virtue of which it has a tendency to resist the change in its state of rest only.
Reason (R) : Force is that external cause which tends to change the state of rest or the state of motion of an object.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Motion in One Dimension
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Answer
assertion is false but reason is true
Explanation
Assertion (A) is false because inertia is the tendency of a body to resist any change in its state, whether it is rest or uniform motion in a straight line. So, it does not apply only to rest, but also to motion.
Reason (R) is true because this is the definition of force as per Newton’s first law as a force causes a change in a body’s state of rest or motion.
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Related Questions
Identify the correct statement from the following :
- Mass is a force and is measured in Newton.
- The weight of a body is the same everywhere in the universe.
- Mass remains constant, but weight changes with gravity.
- Weight is measured using a physical balance.
Assertion (A) : The magnitude of non-contact force between two bodies decreases with the increase in distance of separation between them.
Reason (R) : The magnitude of non-contact force between two bodies varies inversely as the square of distance of separation between them.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
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Assertion (A) : A cricket ball acquires much smaller velocity than a tennis ball when the two balls are pushed with equal force for the same duration.
Reason (R) : Mass is a measure of inertia.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
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Assertion (A) : While catching a ball, a cricketer withdraws his hands along with the ball.
Reason (R) : To every action, there is an equal and opposite reaction.
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