Physics
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
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 when equal force is applied for the same duration, the lighter object (tennis ball) gains more velocity than the heavier object (cricket ball). This is because the cricket ball has more mass, so it accelerates less.
Reason (R) is true because inertia is the resistance to change in motion, and mass quantifies this resistance. A body with more mass (like a cricket ball) resists acceleration more than a lighter one (tennis ball). Since the Reason (R) correctly explains Assertion (A) (i.e., the cricket ball's greater mass/inertia is the reason it acquires less velocity), the statement is fully correct.
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