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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A particle moves in a straight line with retardation proportional to its displacement. The loss of kinetic energy during a displacement $x$ is proportional to

Options:

Answer:

Solution:

$\frac{dv}{dt} \propto - x$

$\frac{dv}{dx} \cdot \frac{dx}{dt} = - cx$

$Vdv = - cx dx$

$\frac{v^{2}}{2} = \frac{- {cx}^{2}}{2}$

$Kinetic energy = \frac{{mv}^{2}}{2}$

$Kinetic energy = \frac{{mcx}^{2}}{2}$

$k \propto x^{2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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