Physics
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
- assertion is false but reason is true
- assertion is true but reason is false
Motion in One Dimension
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Answer
both A and R are true and R is the correct explanation of A
Explanation
Assertion (A) is true because non-contact forces like gravitational, electrostatic, and magnetic forces show same trend.
Reason (R) is true because these forces follow the inverse square law :
Since the reason correctly explains why the force decreases with increasing distance, the assertion and reason are both true, and the reason is the correct explanation.
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Related Questions
The mass of a body :
- changes with a change of place
- changes with direction
- changes when the velocity of the body is close to the velocity of light
- none of these
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) : 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
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
- assertion is false but reason is true
- assertion is true but reason is false