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

PhysicsW.E.P.MiscellaneousMedium2 minPYQ_2010

PhysicsMediumsingle choice

Assertion : If momentum of a body increases by $50%$ , its kinetic energy will increase by $125%$ . Reason : Kinetic energy is proportional to square of velocity.

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Answer:

Solution:

As, $p_{2} = p_{1} + 50%$ of $p_{1} = (3/2) p_{1}$ $∴ v_{2} = (3/2) v_{1}$ As, kinetic energy, $K \propto v^{2}$ $∴ K_{2} = \frac{9}{4} K_{1}$ Increase in $K . E . = \frac{( K _{2} - K _{1} ) \times 100}{K _{1}} = 125%$ .

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

⏱ 2mℹ️ Source: PYQ_2010

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