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

PhysicsW.E.P.PowerHard2 minPYQ_2011

PhysicsHardsingle choice

A box is moved along a straight line by a machine delivering constant power. The distance moved by the body in time $t$ is proportional to

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Answer:

Solution:

$Hints: P = Fv = m \cdot \frac{dv}{dt} \cdot v \int vdv = \int P / mdt; \frac{v ^{2}}{2} = \frac{Pt}{m} V = \frac{2 p}{m} t^{\frac{1}{2}}; \frac{dx}{dt} = \frac{2 p}{m} t^{\frac{1}{2}} \int d x = \frac{2 p}{m} \int t^{\frac{1}{2}} d t; x = \frac{2 p}{m} \frac{t ^{\frac{3}{2}}}{\frac{3}{2}} = \frac{2}{3} \frac{2 p}{m} t^{\frac{3}{2}} x α t^{\frac{3}{2}}$

Stream:WBJEESubject:PhysicsTopic:W.E.P.Subtopic:Power

⏱ 2mℹ️ Source: PYQ_2011

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