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Physics - Rotation Question with Solution | TestHub

PhysicsRotationMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A particle with linear momentum of magnitude $P$ is subjected to a force $F = Kt (K > 0)$ which is directed along the direction of initial momentum. The time after which its linear momentum changes to $3 P$ is

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Answer:

Solution:

$F = \frac{dp}{dt} \Rightarrow Kt = \frac{dp}{dt}$

$\int_{P}^{3 P} dP = \int_{0}^{t} Ktdt \Rightarrow 3 P - P = \frac{{Kt}^{2}}{2} \Rightarrow t = 2 \sqrt{\frac{P}{K}}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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