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

PhysicsW.E.P.PowerEasy2 minPYQ_2020

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A car of mass $1500 kg$ is lifted up a distance of $30 m$ by crane $A$ in $0.5$ minutes. The second crane $B$ does the same job in $1$ minute. The ratio of their powers is

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Answer:

Solution:

Given, mass of the car $(m) = 1500 kg$

Height of car $(h_{1}) = 30 m$

Time taken by crane $A$ in lifting the car $(t_{1}) = 0.5 m i n .$

Time taken by crane $B$ in lifting the car $(t_{2}) = 1 m i n .$

We know that, $P = \frac{m g h}{t}$

$∴ P \propto \frac{1}{t}$

Now, $\frac{P_{1}}{P_{2}} = \frac{t_{2}}{t_{1}}$

$\Rightarrow \frac{P_{1}}{P_{2}} = \frac{60}{30}$

$∴ \frac{P_{1}}{P_{2}} = \frac{2}{1}$

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

⏱ 2mℹ️ Source: PYQ_2020

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